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.

From the moment you arrive in Moreton Bay, stunning natural vistas, fresh and tasty dining, history and more invite you to stay and play.

Untouched national park, mirror-like lagoons and endless stretches of beaches all make Moreton Bay experiences feel like you’ve stumbled across a secret Queenslanders collectively vowed not to tell. Yet it’s easily accessible. Explore further and discover hinterland farms, ancient rainforest, fresh seafood and more: there’s something on offer for every pace, interest and generation.

Just 20 minutes from Brisbane Airport, it’s hard to believe how underrated this Queensland getaway is. Here’s your ultimate guide to rediscover play with unmissable experiences in Moreton Bay.

1. G’Day Adventure Tours, Bribie Island

G’Day Adventure Tours’ Sea to Table Experience should be your first agenda item in Moreton Bay. Take a 4WD journey through the sandy tracks of Bribie Island’s beaches to the still, glassy waters of the island’s lagoons. Glide over perfect replicas of paperbarks and fluffy blue clouds mirrored in the lagoon waters in your kayak. Listen as native birdsong echoes around you.

Then, it’s on to Fort Bribie. During the Second World War, these concrete bunkers – now slowly being enveloped by the dunes – were the last line of defence for Moreton Bay.

End the day with a sun-dappled beach picnic of locally caught Queensland prawns and famous Moreton Bay bugs. As you head home, watch the dolphins playfully dart in and out of the surf.

2. Morgan’s Seafood at Scarborough

Right on the Scarborough Boat Harbour, you’ll find Morgan’s Seafood . Between the luxury yachts, you’ll also spot trawlers and fishermen delivering their day’s catch right to Morgan’s. The family-owned and operated spot is one of the best places to try the region’s eponymous Moreton Bay bug. Or, sample more of the area’s direct-from-the-boat seafood fresh at their oyster and sushi bar. If you’re lucky, your visit might coincide with a day they’ve caught tuna.

Picture fish caught that day, prepared and then served to you as fresh sashimi as the sun sets over the unique silhouette of the Glasshouse Mountains.

3. Woorim Beach, Bribie Island

On Bribie’s eastern coastline, you’ll find Woorim Beach : aka the closest surf beach to Brisbane. Find a place on the sand by the patrolled area or wander further south to find a quiet spot and while the day away between the shaded dunes, the pages of your book and the peaceful sound of rolling waves.

Ask any local where to grab lunch, and they’ll direct you to Bribie Island Surf Club Bistro . Tuck into a fresh, local seafood platter, just metres from the beach.

4. D’Aguilar National Park

D’Aguilar National Park is a 40,000-hectare slice of greenery that stretches from urban Brisbane right up to Woodford (home of the Woodford Folk Festival). The vast expanse of park is home to ancient rainforests, eucalypt forests and shaded swimming spots hidden within gorges and under waterfalls. The area is significant for the Jinibara and Turrbal people, with ceremonial bora rings and dreaming trails all found within the park.

Carve out some time in your itinerary to explore the park’s many trails. The Maiala day-use area is the perfect starting point for walks for all levels of ability.

5. Arcade Wine Bar

arcade wine bar moreton bay — Sit down to a menu inspired by Italy.

Opposite the Redcliffe Jetty and down a laneway, you’ll find an unassuming wine bar. Venture inside and quickly fall in love with Arcade Wine Bar , one of the region’s most beloved local haunts.

Owners Danilo and Matt have a combined 50 years of sommelier experience, which they have poured into the menu, styling and wine list. More than just a hole-in-the-wall wine bar, Arcade Wine is an enoteca (a wine repository), whose walls are lined with bottles upon bottles of Italian wine varietals from every corner of Italy.

Settle in with a wine and work your way through the menu inspired by Danilo’s native Italy: traditional meatballs, their quick-to-sell-out terrine, or a selection of Italian cheeses, charcuterie and arancini.

6. Wamuran & Loop Rail Trail

Away from the ocean, tucked in the hinterland, is the Wamuran & Loop Rail Trail . Perfect for cyclists or walkers, the trail was built to showcase the history of the Caboolture to Kilcoy rail corridor (last operating in 1964) and makes for the perfect family day out. The trail runs for 10.5km and connects Wamuran and Caboolture via an accessible path.

Pass through former railroad, bridges and shaded bushland as you cut from A to B. Plus, visit in winter for a detour along the way to one of the many pick-your-own strawberry farms.

7. Farm Visits

Beaches, mountains and history make an enticing combination. But Moreton Bay also brings hinterland, family-friendly farms to the table. Trevena Glen is one of the area’s most loved, with bunnies, ponies, sheep, alpacas (and more) available to visit for the kids. For the adults, book a horse-riding session and be treated to a grazing platter as you watch the sun set over the mountains of D’Aguilar National Park.

At White Ridge Farm , find camels, putt-putt, train and tractor rides and all kinds of animals. The entire farm is paved, making it accessible for all.

8. Miss Sprinkles

Miss Sprinkles Gelato moreton bay — Pick your scoop at Miss Sprinkles Gelato.

An ice cream at the beach is one of life’s most perfect pleasures. While in town, stop by Miss Sprinkles for the locals’ pick of homemade gelato on the Scarborough foreshore.

The gelato here is made the authentic Italian way and scooped up just across from the beach. Or, settle in at their kitschy pink wooden tables for traditional gelato in the sunshine. Aside from the homemade gelato, you’ll also find tarts, pies and even doggie gelato.

To start planning your Moreton Bay trip, or for more information, head to visitmoretonbay.com.au.

The fascinating sinkholes in Mount Gambier to visit