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.

Need tips, more detail or itinerary ideas tailored to you? Ask AT.

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?

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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.

Located just an hour north-west of Melbourne, the largely undiscovered Macedon Ranges quietly pours some of Australia’s finest cool-climate wines and serves up some of Victoria’s best food.

Mention the Macedon Ranges and most people will think of day spas and mineral springs around Daylesford, cosy weekends away in the countryside or the famous Hanging Rock (of enigmatic picnic fame). Or they won’t have heard of the Macedon Ranges at all.

But this cool-climate destination has been inconspicuously building a profile as a high-quality food and wine region and is beginning to draw serious attention from oenophiles and epicureans alike.

The rise of Macedon Ranges wine

liquid gold barrels at Kyneton Ridge Estate Winery — Barrels of liquid gold at Kyneton Ridge Estate Winery. (Image: Chloe Smith Photography)

With elevations ranging from 300 to 800 metres, Macedon Ranges vineyards are among the highest in the country. This altitude, combined with significant day/night temperature swings, makes for a slow ripening season, in turn nurturing wines that embody elegance and structure. Think crisp chardonnays, subtle yet complex pinot noirs and delicate sparkling wines, along with niche varietals, such as gamay and nebbiolo.

Despite the region’s natural advantages – which vary from estate to estate, as each site embodies unique terroir depending on its position in relation to the Great Dividing Range, soil make-up and altitude – the Macedon Ranges has remained something of an insider’s secret. Unlike Victoria’s Yarra Valley or Mornington Peninsula, you won’t find large tour buses here and there’s no mass marketing drawing crowds.

Many of the 40-odd wineries are family-run operations with modest yields, meaning the wineries maintain a personal touch (if you visit a cellar door, you’ll likely chat to the owner or winemaker themselves) and a tight sales circle that often doesn’t go far beyond said cellar door. And that’s part of the charm.

Though wines from the Macedon Ranges are just starting to gain more widespread recognition in Australia, the first vines were planted in the 1860s, with a handful of operators then setting up business in the 1970s and ’80s. The industry surged again in the 1990s and early 2000s with the entry of wineries, such as Mount Towrong, which has an Italian slant in both its wine and food offering, and Curly Flat , now one of the largest estates.

Meet the new generation of local winemakers

the Clydesdale barn at Paramoor. — The Clydesdale barn at Paramoor. (Image: Chloe Smith Photography)

Then, within the last 15 years, a new crop of vignerons like Andrew Wood at Kyneton Ridge Estate , whose vineyard in 2024 was the first in the Macedon Ranges to be certified by Sustainable Winegrowing Australia; Geoff Plahn and Samantha Reid at Paramoor , who have an impressive cellar door with a roaring fire and studded leather couches in an old Clydesdale barn; and Ollie Rapson and Renata Morello at Lyons Will , who rapidly expanded a small vineyard to focus on top-shelf riesling, gamay, pinot noir and chardonnay, have taken ownership of local estates.

Going back to the early days, Llew Knight’s family was one of the pioneers of the 1970s, replacing sheep with vines at Granite Hills when the wool industry dwindled. Knight is proud of the fact that all their wines are made with grapes from their estate, including a light, peppery shiraz (some Macedon wineries purchase fruit from nearby warmer areas, such as Heathcote, particularly to make shiraz) and a European-style grüner veltliner. And, as many other wineries in the region do, he relies on natural acid for balance, rather than an additive, which is often required in warmer regions. “It’s all about understanding and respecting your climate to get the best out of your wines,” he says.

farm animals atKyneton Ridge Estate — Curious residents at Kyneton Ridge Estate. (Image: Chloe Smith Photography)

Throughout the Macedon Ranges, there’s a growing focus on sustainability and natural and low-intervention wines, with producers, such as Brian Martin at Hunter Gatherer making waves in regenerative viticulture. Martin previously worked in senior roles at Australia’s largest sparkling winemaking facility, and now applies that expertise and his own nous to natural, hands‑off, wild-fermented wines, including pét‑nat, riesling and pinot noir. “Wild fermentation brings more complexity,” he says. “Instead of introducing one species of yeast, you can have thousands and they add different characteristics to the wine.”

the vineyard at Kyneton Ridge Estate Winery — The estate’s vineyard, where cool-climate grapes are grown. (Image: Chloe Smith Photography)

Most producers also focus on nurturing their grapes in-field and prune and pick by hand, thus avoiding the introduction of impurities and the need to meddle too much in the winery. “The better the quality of the fruit, the less you have to interfere with the natural winemaking process,” says Wood.

Given the small yields, there’s also little room for error, meaning producers place immense focus on quality. “You’re never going to compete in the middle [in a small region] – you’ve got to aim for the top,” says Curly Flat owner Jeni Kolkka. “Big wineries try to do things as fast as possible, but we’re in no rush,” adds Troy Walsh, owner and winemaker at Attwoods . “We don’t use commercial yeasts; everything is hand-harvested and everything is bottled here, so we bottle only when we’re ready, not when a big truck arrives.” That’s why, when you do see a Macedon Ranges product on a restaurant wine list, it’s usually towards the pointy end.

Come for the wine, stay for the food

pouring sauce onto a dish at Lake HouseDaylesford — Dining at Lake House Daylesford is a treat. (Image: Chloe Smith Photography)

If wine is the quiet achiever of the Macedon Ranges, then food is its not-so-secret weapon. In fact, the area has more hatted restaurants than any other region in Victoria. A pioneer of the area’s gourmet food movement is region cheerleader Alla Wolf-Tasker, culinary icon and founder of Daylesford’s Lake House.

For more than three decades, Wolf-Tasker has championed local producers and helped define what regional fine dining can look like in Australia. Her influence is palpable, not just in the two-hatted Lake House kitchen, but in the broader ethos of the region’s dining scene, as a wave of high-quality restaurants have followed her lead to become true destination diners.

the Midnight Starling restaurant in Kyneton Ridge Estate Winery — The hatted Midnight Starling restaurant is located in Kyneton. (Image: Chloe Smith Photography)

It’s easy to eat well, whether at other hatted restaurants, such as Midnight Starling in the quaint town of Kyneton, or at the wineries themselves, like Le Bouchon at Attwoods, where Walsh is inspired by his time working in France in both his food offering and winemaking.

The beauty of dining and wine touring in the Macedon Ranges is that it feels intimate and unhurried. You’re likely to meet the winemaker, hear about the trials of the latest vintage firsthand, and taste wines that never make it to city shelves. And that’s worth getting out of the city for – even if it is just an hour down the road.

Delicate dishes on the menu at Midnight Starling. (Image: Chloe Smith Photography)

A traveller’s checklist

Staying there

the accommodation at Cleveland Estate, Macedon Ranges — Stay at the Cleveland Estate. (Image: Chloe Smith Photography)

Soak up vineyard views from Cleveland Estate near Lancefield , embrace retro charm at Kyneton Springs Motel or indulge in lakeside luxury at the Lake House .

Eating there

Enjoy a four-course menu at the one-hatted Surly Goat in Hepburn Springs, Japanese-inspired fare at Kuzu in Woodend or unpretentious fine dining at Mount Monument , which also has a sculpture park.

Drinking there

wine tasting at PassingClouds Winery, Macedon Ranges — A tasting at Passing Clouds Winery. (Image: Chloe Smith Photography)

Settle in for a tasting at Boomtown in Castlemaine, sample local drops at the cosy Woodend Cellar & Bar or wine-hop around the many cellar doors, such as Passing Clouds .

the Boomtown Winery and Cellar Bar signage — Boomtown Winery and Cellar Bar. (Image: Chloe Smith Photography)

Playing there

a scenic river in Castlemaine — Idyllic scenes at Castlemaine. (Image: Chloe Smith Photography)

Wander through the seasonal splendour of Forest Glade Gardens , hike to the summit of Hanging Rock, or stroll around the tranquil Sanatorium Lake.

purple flowers hanging from a tree — Purple flowers hanging from a tree. (Image: Chloe Smith Photography)

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

The Macedon Ranges is Victoria’s best-kept food and wine secret

Located just an hour north-west of Melbourne, the largely undiscovered Macedon Ranges quietly pours some of Australia’s finest cool-climate wines and serves up some of Victoria’s best food.

The rise of Macedon Ranges wine

Meet the new generation of local winemakers

Come for the wine, stay for the food