Valley of the Giants

The southwest of Western Australia is known well for its extensive hardwood forests but nothing can quite prepare you for their immense size and extent when you experience them for the first time. Such has been the case for us after driving many thousands of kilometres through treeless plains, deserts and coastal bush.

We have now entered the huge belt of forests that sit along the southwest coast. We are surrounded in every direction by National Parks with the occasional clearing for cattle or sheep farms and an increasing number of vineyards. Long gone are the endless straight roads now replaced with undulating and winding routes through heavy forestation and between giant Karri trees.

Valley of the Giants Treetop Walk

Today’s adventure takes us to the Valley of the Giants Treetop Walk set deep within a Tingle forest northeast of Walpole. It’s not a place for the faint hearted, those with a fear of heights, unsteady on their feet or suffer from dendrophobia, for today we’re up among the tree tops 45-metres above the ground.

Among the Giants

Entry into the Valley of the Giants gives a teasing view of the sheer size of the Tingle tree. Living for as much as 400-years, rising to a height of 75-metres and with a 20-metre girth, the Tingle tree has an extremely restricted range relying on a minimum of 1000mm of annual rain, a low nutrient free-draining gravel soil, hilly terrain and minor seasonal change.

Since the ancient land mass of Gondwana began to break-up all the major continents have drifted away with the exception of the southwest corner of Western Australia. Having moved the least, conditions here remain as they have been for millions of years enabling many species to survive from those ancient times including the tingles, relict spiders and several species of snail.

The red and yellow tingle trees have enormous straight trunks with branching arms almost as thick, though the smaller yellow tingle grows only to a height of 40-metres. They are immensely strong but the red tingle has an achilles heel – its trunk is susceptible to insect and fungus attack that ultimately rots the central core and exposing it to the effects of fire.

Red Tingle Walkway

Unlike most eucalypt trees the red tingle is unique in not having a central tap root, instead it has a shallow but widespread root system giving the tree a very stable base on which to grow to its enormous height.  And, as the tree ages, its base expands forming a buttress unlike the yellow tingle, which helps to differentiate the two species. The yellow tingle is also less susceptible to insect and fungi damage.

Walking the Ancient Empire trail

A short sealed path guides you around the forest’s Ancient Empire Trail where many of the giant tingle trees can easily be identified between the less bulky but significantly taller Karri trees. Standing by one of these giants is an experience, there aren’t many places in the world where you are dwarfed in such a significant way by a living object. To protect the shallow roots from foot traffic raised timber platforms transport you just above the forest floor.

Yellow Tingles

A flash of colour

While admiring the trees and the peace and quiet of the forest, stand still for a while and you are likely to catch a flash of colour from one of the many colourful birds that live among the trees and one in particular the beautiful but tiny Red-winged Fairy Wren. Trying to photograph one of these is a real challenge, not just because of their diminutive size but the fact they don’t stand still long enough! Take a seat by the coffee truck and the Fairy Wrens will soon be paying you a visit along with raucous crows.

Tree Top Walk

The second, and most adventurous, part of our visit is the tree top platform walk that takes you from ground level right up into the tree canopy of the tingle forest. Brave pants may be required as you begin to notice the high-level platform swaying under foot as the well polished handrails attest.

It is very much worth any fear of heights to explore life among the canopy, a far different experience from just looking up to the sky. It makes you realise just how brave birds must be perched up high on a branch. Just imagine the fear an emu would feel up here!

Among the Tingles

The platform, assembled by hand without the use of helicopters and heavy machinery, extends for 600-metres rising to a peak of 40-metres and creating a circular route. You can go around as many times as you like and for as long as your nerves will bear.
NB. The second time around is easier as I discovered filming the circuit for Catherine so she can later see what it is like when you have your eyes fully open.

The swaying of each of the 60-metre platform spans is apparently intentional to ‘create the sensation of being in the canopy of the forest’. Well it certainly does that as does the steel mesh deck, which ‘reinforces the sensation of being high up in the forest canopy’.

Wildlife

Though not always visible, the Tingle forest is home to many creatures especially marsupials for which this country is famous. Among the collection you may spot the cute Quokka, Brush-tailed possums, Brush-tailed phascogales, Mardos (a shrew-like marsupial), Chuditch (the Western Quoll) and my favourite – the hell-raising Motorbike frog.

The Valley of the Giants and Tree Top Walk is an excellent experience and highly recommended for all ages. There is also a night time tour available during school holidays and for group bookings, where you may get to see some of the many nocturnal creatures that call the amazing tingle forest home.

The Nannup Tiger!!

To survive as a small outback town these days requires the ability to attract passing trade. And it appears to have become customary to try and create, or at the very least promote, something unique about your town to tempt the curious to stop for a while longer than a casual glance or a fuel stop on the way to some distant destination. It may be a collection of old machines stretching for a mile by the roadside as was the case in Ilfracombe, a museum or hall of fame dedicated to some local collection, talent or character such as The Waltzing Matilda Museum in Winton or The Stockman’s Hall of Fame in Longreach, but if it can be made yours only then all the better. And, of course, we must not forget the giant possum, galah, lobster, ram, banana, pineapple…

Nannup

All this brings us to the small and easily passed town of Nannup surrounded by forest at the junction of Highway 10 and Highway 104. Here stalks a local beast rarely sighted but encountered often enough to rouse interest and keep the story alive and in the news. Allegedly a large dog-like animal, of a type previously thought to be extinct, wanders throughout the region occasionally posing for a blurry photograph. The beast has a distinctly long snout with tiger-like stripes to the rear half of it’s body and an unusually long dark tail.

Nannup Tiger

It is thought the creature is a Thylacine – a marsupial carnivore, otherwise known as a Tasmanian Tiger – though the last one believed to exist died in captivity in 1936. Not unique to Tasmania despite its name, the creature became extinct on the mainland about 3,000 years ago but the thylacine is known to have spread as far west as Western Australia and north into Papua New Guinea with fossil records dating back at least 4-million years.

So, it might just be possible in this vast land of ours that a few survivors may still exist out there.

The Nannup Tiger?

But is this just a ruse to attract tourists? After all, Nannup is well provided with cafes and interesting country shops to stop and explore for a while – would it really need to make up such a story? Well, in the brief time that we had to stop for a coffee and stretch our legs along the high street, I was startled to catch sight of the creature lurking among bushes beside the pavement!

It is definitely not a dog. But, despite its rather plastic-looking demeanour and remarkable stillness, it does in fact look like a Tasmanian Tiger and, strangely, it appeared quite happy for me to take a photograph. All I need to do now is add a little blur in Photoshop and add it to Nannup’s collection of sightings.

If you happen to be passing through Nannup, stop for a while, enjoy a great coffee or a meal in one of the many cafes and help support the local economy. And keep your eye out, you never know, you may too encounter the Nannup Tiger.

Jewel Cave

You may be forgiven, reading this, that we have all of a sudden become troglodytes trying to escape the current cooler weather in the southwest of WA. But, again, we’re heading deep underground to explore one of nature’s relatively young but spectacular caves.

Karri Tree formation

Stalactite overload

We thought Ngilgi Cave was pretty special but Jewel Cave is something altogether different. Situated close to the town of Augusta on Caves Road (where else?), Jewel Cave is the most recently developed of the Cape’s caves open to the public.

Windy Hole

In the early 1900’s a hole in the ground was known about where wind appeared to be emanating from deep below. But it was not formally ‘discovered’ until Cliff Spackman chanced upon a strong upward blast of air from the ground while exploring the area in 1957. The narrow hole had been formed initially by tree roots penetrating the limestone but later widened by the action of water. Cliff’s fellow explorers lowered him by rope through 12-metres of rock to find himself surrounded by a staggering collection of stalactites, stalagmites, pendulums, flowstones and the more unusual, and peculiar, helictites, a crystal formation that Jewel Cave is especially renowned for worldwide.

The following year Cliff, Lloyd Robinson and Lex Bastian returned to further explore the cave, which continued for more than 2KMs and reached down to a depth of 42-metres. And there were more than a few surprises in store. Hidden beneath a layer of soil was uncovered the skeleton of a now extinct Thylacine – a Tasmanian Tiger that must have fallen into the pitch black cave with no means of escape.

The age of the remains are unknown but radio dating of one of the cave’s crystals has put a date on the cave formation at a minimum of 466,000-years and the limestone it sits within a geologically young 1-million years old.

Cliff and his team spent a year developing the show cave as a tourist attraction installing steps, suspended platforms and lighting before opening to the public on Boxing Day 1959.

Hundreds and hundreds of Stalactites

Defying Gravity

The cave is absolutely crammed with every type of decoration, as the crystal features are known, but a few take on some quite peculiar shapes twisting randomly, often growing horizontally and even turning right around and growing back upwards as if defying gravity.

Known as Helictites they start as a straw-like formation – a hollow tube. Normally the straw will continue to grow downwards but under certain conditions the dripping water from the cave roof settles more to one side of the straw than the other. With each new layer the direction the straw takes depends on how the calcite’s crystal structure forms.

Giant straws

Among the very special decorations in Jewel Cave is an incredibly delicate straw stalactite just millimetres thick but an enormous 5.43-metres long – the longest found, so far, in any cave in Australia and believed to be at least 10,800-years old.

Delicate Pendulums

Pendulums

A few similar straws have developed bulbous nodules that look like pendulums. It’s hard to imagine how such a delicate straw can support the weight of these growing crystals. Studies have shown that the crystal formations in the cave grow on average 0.5mm each year. Just one slight touch and they could snap and fall destroying tens of thousands of years growth.

Karri Tree Formation

In the main cavern is a large flow formation that, when observed more closely, resembles a forest of Karri trees.

Carbon Dioxide

As was the case with Ngilgi Cave the level of carbon dioxide in the air is higher than on the surface above. This is a result of the chemical process that forms the cave’s decorations, a process that has existed for hundreds of thousands of years. Though perfectly safe it does reduce your energy levels while in the cave and requires a little more effort climbing the steps back up to the surface. But it is absolutely worth the effort to be rewarded with such a spectacular example of nature and something a very, very long time in the making.

Where Oceans Collide

Today marks the day that we reach the most south-westerly point in Australia, a place called Cape Leeuwin, named by Mathew Flinders in 1801. It is a place where, somewhat controversially, two great oceans – the Indian Ocean and the Southern Ocean – meet.

Oceans Collide – or do they?

It appears all but Australia consider the Southern Ocean to actually begin along the 60th parallel south line of latitude, which is a very long way south of Australia. But let’s not spoil an opportunity to attract tourists to the cape.

Cape Leeuwin Lighthouse

Sitting close to the tip of the cape is Australia’s third largest lighthouse and the largest in Western Australia – Cape Leeuwin Lighthouse. Standing at 39-metres tall, almost twice the height of Cape Naturaliste Lighthouse, Cape Leeuwin’s lighthouse was built from locally quarried limestone and first lit in 1895. Like all other lighthouses around Australia, Cape Leeuwin Lighthouse wasn’t spared the march of ‘progress’ and it too became automated in 1982.

There is a small fee to access the grounds of the lighthouse or a tour of the lighthouse itself giving a grander view from the top deck and a great viewing point for the migrating whales, which pass close by. All proceeds go towards the maintenance and preservation of the lighthouse, cottages and supporting buildings. An onsite cafe serves tea, coffee and light meals with great views of the oceans.

Cape Leeuwin Lighthouse

Waterwheel

An unusual attraction in close proximity of the lighthouse is a waterwheel, though it’s not quite what you would expect. Built during the construction of the lighthouse, the waterwheel was powered by a natural freshwater spring and pumped water up to the construction team at the lighthouse for concrete and cement mixes saving transport costs in, what was at the time, a very remote location. Even the limestone was local being extracted from the nearby, and appropriately named, Quarry Bay.

Waterwheel – set in stone

Now, however, the calcium rich water has encased the wheel and much of the pumping mechanism in calcified lime. The water level has since dropped and now an electric pump is used to feed water along the trough to help preserve the timbers from drying and cracking.

It’s certainly an unusual sight but well worth the short stroll from the lighthouse car park even if it’s just to enjoy the views across the bay.

Ngilgi Cave

Previously known as Yallingup Cave due to its proximity to the nearby town,  it was later changed to Ngilgi Cave, pronounced ‘Neelglee’, to reflect is Aboriginal name. Ngilgi Cave is one of a series of Karst Limestone caves in the southwest of Western Australia. Surprisingly it has had a lot of influence on the development of the region and unusual in that for a visitor it is largely a self guided tour.

Though known for thousands of years by the local Wardandi Aboriginal mob, it was first ‘discovered’ in 1899 by European settler Edward Dawson while searching for lost horses. His chance encounter was a life changing event as he became the resident cave tour guide for the next 37-years.

Stalactites and Stalagmites

Ngilgi Cave is like no other cave we have seen. Stalagmites and stalactites appear as soon as you begin to descend the steep staircase. Here the crystals take on a dull grey colour due to atmospheric exposure and dust but within metres you are standing in a small amphitheater surrounded by every type of crystal structure from straw-like pipes, wavy shawls, cascades as well as the more common stalactites and stalagmites. Every where you look there is something to see.

Karst Limestone

The cave was formed tens of thousands of years ago by a process that continues to this day. Rain passing through the atmosphere absorbs carbon dioxide forming a weak carbonic acid. The acid then intensifies as it passes through carbon dioxide rich soil and begins to dissolve the limestone beneath. Eventually small cracks appear accelerating the erosion and increasing the flow of water through the rock. In the case of Ngilgi Cave the downward passage of water eventually formed a river deep underground that worked its way out to the sea.

39-metres below

Free to wander

Our tour guide, Andre, explained the story of the cave including the discovery of bones from long extinct animals that fell into the shaft of the cave and evidence of Aboriginal habitation dating back 45,000-years. From here you are free to wander deeper into the cave guided by a well constructed path, steps and handrails. Considerable care is needed as the path is often narrow, the cave roof low and the steps steep – and often all three together.

It requires a certain level of fitness made all the more difficult as the humidity and carbon dioxide levels increase the further you descend into the cave.

The path takes you through multiple chambers often with large cracks in the ceiling and huge chunks of rock locked together as they fell but still forming an alarming looking roof directly above. Andre advised us that as well as friction holding the structure in place, secondary cementation by dissolved limestone bonds the rocks together. It certainly looks precarious but it has been this way for thousands of years. Still, you feel as though it could give way at any time or one of the thousands of needle-sharp stalactites may break free and pin you to the ground.

Cascading Stalactites

As you descend deeper the crystals become increasingly white and eventually clear enough for light to pass through. Several have lights behind them showing bands of colour formed by tannins leached from the vegetation above ground.

Taking it all in

The highlight of the cave is a large, circular cavern decorated over its entire surface with thousands of crystal structures. It really is an awesome sight and the place you’ll likely spend most of you time looking and wandering around. Andre had arranged a collection of crystals to look at showing how the colour changes by depth and an opportunity to hold them and realise just how heavy they are. Here is a spot to just admire what nature has created or ask any questions that may come to mind before heading back up the hundreds of steps to the surface.

Hidden Treasure


As you begin the accent one last feature will catch your eye. Known as the Jewel Casket, nestled in the cave wall is a miniature grotto with small stalactites that have spiky crystal structures radiating from their tips. These are Dog Tooth Crystals that form where a pool of supersaturated calcium bicarbonate exists. They’re certainly unusual and with the attached stalactites they resemble some form of medieval weapon used to disable your opponent.

The Jewel Casket

The climb back to the cave entrance was much easy than expected, likely a result of the increasingly fresh air, and we were soon back among the scrub where you would have little knowledge that such an amazing sight exists just metres below your feet.

It’s a MUST see

A visit to Ngilgi Cave is very highly recommended but if you are a photographer note that tripods are not allowed in the cave but you are free to use a flashgun. All the photographs here were taken with an iPhone 8 and only the Jewel Casket needed a flash.

Access is suitable for most people including children as long as you are comfortable with confined spaces and a lot of steps.