Fascinating Mount Gambier Sinkholes To Visit

Fancy a swim in a dazzling cobalt waterway, or a stroll around a lush, emerald wonderland? The famous Mount Gambier sinkholes can set the mood for every kind of adventure.

Reykjavik, Naples, Cartago; when you’re yearning to explore a dramatic volcanic landscape, there’s only one destination where the sinkholes – a depression caused by the collapse of the surface layer – are a celebration (particularly in the warmer months): Mount Gambier on South Australia’s spectacular Limestone Coast.

Proving that good things are worth the wait, geologists believe that Mount Gambier’s (justifiably) famous sinkholes are the result of rain on the region’s three fault lines breaking up the huge expanse of limestone, more than 25 million years old, spanning South Australia’s south-east. Water flowing through the limestone has formed 50 sinkholes, with at least 15 of them filled with water.

So, when is the best time to take advantage of Mount Gambier’s sinkholes? While Mount Gambier itself is a treat to visit year-round, aqua babies are best to plan a trip in the warmer months, between November and March, when the water is less biting and the colour morphs from a hue which can fall anywhere from steel grey or garden variety blue to vibrant cobalt. The good news? Whether you hire a car and drive to each spot (easily done since most of the major holes are located within a 20-minute drive of one another) or book a tour, there’s the perfect sinkhole experience for every kind of traveller, including these tourism-heavy hitters.

Kilsby Sinkhole

Will it be snorkelling, scuba diving, free diving or a sinkhole tour of the training site for the South Australian Police? At Kilsby Sinkhole , located on a sheep farm among the rolling grasslands of Moorak just 14 kilometres south of Mount Gambier, you can choose all of the above.

Out here, where it’s not unusual for people to show up in mermaid outfits for the ultimate photoshoot, water clarity has drawn people to the site for decades, the giant chasm descending 65 metres and allowing up to 50 metres (most days) visibility for scuba drivers and freedivers, and pristine water clarity for those who prefer to frolic towards the surface. 50-minute guided tours cover the sinkhole’s fascinating history and geology – a real hit with the kids.

a diver facing the light as it passes through the water under Kilsby Sinkhole — It’s a stunning sight when the sun rises over Kilsby Sinkhole. (Image: Adam Stern)

Snorkelling tours run for two hours, complete with a safety briefing and under the supervision of a snorkel supervisor, while those interested in diving and freediving can book a licensed operator to help their dream come true.

Kilsby Sinkhole is a privately owned site, thus, all visits must be pre-booked online. The good news? They now offer a range of two-bedroom luxury villas at a surprisingly affordable price point, so you can take advantage of the sinkhole (and its surrounds) day after day.

Umpherston Sinkhole

In the middle of Mount Gambier’s city streets, a lush, subterranean oasis blooms some 20 metres deep in a natural well providing cool respite for those who want to escape those blazing days, but don’t much fancy getting wet.

Named after its designer James Umpherston who designed this urban botanic garden in the late 1800s, Umpherston Sinkhole/Balumbul (one of the most photographed locations on the Limestone Coast) was once a cave formed through the dissolution of the limestone, becoming a sinkhole only after the top of its chamber collapsed and its topsoil provided the perfect environment on which flora to grow.

lush greenery at Umpherston Sinkhole — Stroll through the enchanting vines. (Image: South Australian Tourism Commission/Adam Bruzzone)

Now it’s best described as a gateway to a secret world filled with hanging vines and terraces, the depth and scale of which is best enjoyed from the viewing platforms before taking a walk down to the bottom to view the hydrangeas (but only after grabbing an ice cream or coffee from the onsite kiosk). Yep, at Umpherston Sinkhole, it’s all about walking and observing.

Beautiful any time of day, locals swear by a visit at dusk when the friendly locals, the Umpherston possums, come out to greet their visitors. Why not stick around and make use of the free barbecue area?

Little Blue Lake

Disregard its name; Little Blue Lake is actually a sinkhole with a difference: the ability to change colour like a mood ring so that the steel grey it rocks throughout the winter months transforms into a vibrant cobalt blue come the summertime (November to March). It’s all thanks to a phenomenon caused by the formation of calcite crystals warmed by the rays of the sun.

Located in the Kanawinka volcanic area, wedged between the two (mercifully) dormant volcanoes of Mount Gambier and Mount Schank, follow the campervans making a line to Little Blue Lake, which is conveniently situated in a paddock by the highway.

a diving platform above the milky turquoise waters of Little Blue Lake, Mount Gambier — Mount Gambier’s Blue Lake transforms into milky turquoise between November and March. (Image: Lucy Adamopoulos)

With a 47-metre depth, plus a diameter of 40 metres, the lake is what you might call bracing – a fact locals love and visitors quickly get used to as they enter the sinkhole via the stairs or ramp. Your best bet? Warm up beforehand or afterwards by lying out in the sun, or by enjoying a picnic (you’ll have to bring your own provisions). Just beware that there are no public amenities, so best to use the bathroom before you depart from your accommodation.

Got plenty of time in and around Mount Gambier up your sleeve and are keen to experience further sinkholes? Be sure to also put Ewens Ponds, Hell’s Hole and Caroline Sinkhole on your list.

Wanting to explore the rest of Mount Gambier? Follow our guide for awe-inspiring things to do in Mount Gambier.

Whales breaching, fires crackling and slow-cooked feasts that make the cold so cosy, one might wish it lasted longer. Winter is no time to stay at home in NSW.

When the mercury drops, winter in NSW comes into its own. Beaches are quieter, the air is crisper and hearty food tastes even better when there’s ice on the windows.

Winter here isn’t for hiding away. It’s for long walks, deep baths, deeper reds and the kind of fireside lounging that feels simultaneously indulgent and entirely deserved after a day of exploring. From whale-watching up north to moodily lit bushwalks and pastry pilgrimages, we’ve mapped out your new favourite season.

a beach winter in nsw — From coastal walks to tasty delights, winter in NSW is a time to get out and about.

The Tweed

In winter, the NSW north coast has a front-row seat to one of nature’s greatest migrations. From May to November, humpbacks cruise past the Tweed coast between Antarctica and the Great Barrier Reef. Spot them from the Cabarita Beach headland or get up closer with a boat cruise.

Inland, find the Tweed Regional Gallery & Margaret Olley Art Centre , which is home to a rotating cast of big-name exhibitions (including Monet).

Later, grab a table at Bistro Livi , where the modern Spanish menu features whipped salt cod on toast and spanner crab with curry butter and spelt flatbread. Stick around to poke through the artist studios and indie boutiques of M|Arts Precinct .

visitors at Tweed Regional Gallery & Margaret Olley Art Centre — Browse the art. (Image: Destination NSW)

The next day, jump aboard the Indigenous Lunch Cruise with Tweed Escapes. You’ll cruise upriver listening to yarns from local Indigenous guides, stop at the Minjungbal Aboriginal Cultural Museum and tuck into lemon myrtle-crusted snapper.

Next, drive out to Farm & Co to pull apart some juicy smoked lamb shoulder with green olive tapenade while gazing out over the macadamia fields and avocado groves of this working farm.

End the day at Mantra on Salt Beach where you’ll enjoy beach access, a heated rock spa and a lagoon pool.

dining room at Bistro Livi — Taste modern Spanish at Bistro Livi.

Blue Mountains

The cold season is hands down the best time to visit the Blue Mountains. Temperatures are perfect – sunny enough for hikes, and crisp enough at night for snuggling up.

For a trip that equally soothes and stirs, start with a meditative meander through the national park’s eucalypts and Australian wildflowers. Brave the steepest passenger railway in the world, Scenic Railway , then hop the Skyway aerial cable car for unrivalled Three Sisters views.

Thaw out at the Japanese Bath House in South Bowenfels. Soak in steamy outdoor onsens filled with natural mineral water and mountain views, wander the rose and zen gardens, or sip hot drinks in the tea house.

group leader at Blue Mountains Stargazing — Rug up for Blue Mountains Stargazing. (Image: Destination NSW)

Afterwards, head to Ates in Blackheath, where everything revolves around a 150-year-old ironbark-fuelled oven – like the wood-roasted duck with nectarines and Szechuan spice. Or visit Tempus Katoomba , which leans experimental and sustainable, serving up dishes like braised fennel with cumin, spiced yogurt and Aleppo pepper.

Rug up and head into the night with Blue Mountains Stargazing . Sessions are guided by astrophysicists, helping you understand what you’re looking at as you look into deep space.

Wrap it all up at Fairmont Resort Blue Mountains – MGallery Collection . There’s a whiskey bar in the basement (and crackling fires that make a dram taste even better), indoor and outdoor pools and a day spa. Kids will love the mirror maze and ice rink, too.

dishes laid out on table at Fairmont Resort Blue Mountains — End the day with delicious meals at Fairmont Resort Blue Mountains. (Image: Destination NSW)

Southern Highlands

Good food and wine by the fire, experienced between sifting through second-hand treasures, is a winter vibe in Bowral.

Start with a lap around Dirty Janes , an antique and vintage market. Recover from your shopping frenzy at Bendooley Book Barn , where floor-to-ceiling shelves and a roaring fire set the tone for an afternoon of red wine or hot coffee.

When it’s time to eat, head to Hickory’s Restaurant & Bar , Peppers Craigieburn Bowral’s onsite restaurant. Try the crispy pork belly with Granny Smith crisps and apple gel, or ocean trout with wakame, lemon gel and pickled radish.

couple looking through Dirty Janes in bowral — Wander the antiques at Dirty Janes. (Image: Destination NSW)

Another option, Onesta Cucina , does Italian with flair. For something more casual (with cocktails), Flour Bar swings between brunch and dinner, with an onsite bakery, over 400 wines and a hidden deli in the old bank vault.

Later, clamber Mt Gibraltar , where trails wind through eucalypt forest to views over Bowral and Mittagong.

Stay at Peppers Craigieburn Bowral , a century-old estate with open fires, elegant lounges and a nine-hole golf course.

woman and her dog winter in nsw at Peppers Craigieburn Bowral — Stay cosy at Peppers Craigieburn Bowral.

Penrith

Shake off winter inertia with an adrenaline boost out in Penrith. Kick things off with a kayak paddle on the Nepean River with Horizon Line, or head to Cables Wake Park , where cold-weather wetsuits take the edge off a wipeout.

For something a bit more cruisy, opt for the Nepean Belle Paddlewheeler for slow-floating views and a hot cuppa.

kayakers on the nepean river in penrith — Head out on the Nepean River. (Image: Destination NSW)

Refuel at Marcel Bar & Bistro , where reimagined European comfort food – like seafood risotto in bisque with little neck clams and Moreton Bay bugs – is king. Then check in at the Pullman Sydney Penrith , the area’s first international five-star hotel, to enjoy your well-earned rest.

Start planning your NSW winter getaway at all.com.

The fascinating sinkholes in Mount Gambier to visit

Fancy a swim in a dazzling cobalt waterway, or a stroll around a lush, emerald wonderland? The famous Mount Gambier sinkholes can set the mood for every kind of adventure.

Kilsby Sinkhole

Umpherston Sinkhole

Little Blue Lake

7 excellent Mount Gambier restaurants to try now

The perfect 3-day Mount Gambier itinerary

A guide to the magical blue lakes of Mount Gambier

Mount Gambier accommodation: An ultimate guide to the very best stays

No time to hibernate: experience the best of winter in NSW

Whales breaching, fires crackling and slow-cooked feasts that make the cold so cosy, one might wish it lasted longer. Winter is no time to stay at home in NSW.

The Tweed

Blue Mountains

Southern Highlands

Penrith