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Australians are travelling to a 'spectacular' sunken garden that looks like a set from Avatar to capture epic Instagram photos.

The lush green landscape is nestled in a sinkhole that was once a limestone cave in Mount Gambier, just under five hours' drive south of Adelaide, SA, or the same distance west of Melbourne, VIC. 

It was created when the top of the cave's chamber collapsed, with gardens opened there by Scottish emigrant farmer, James Umpherston, in 1886.

The site now features viewing platforms, sculptures, benches and walking paths that wind around vibrant flower beds and terraces of native plants where hanging vines drape overhead.

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Australians are travelling to this 'spectacular' sunken garden that looks like a set from Avatar to capture epic Instagram photos

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Open from dawn until dusk, the Umpherston Sinkhole comes alive at sunset each evening when possums venture into the floodlit gardens to feed.

Best of all, entry is free.

Many say the beauty of the sinkhole 'needs to be seen to be believed'.

Photos and videos on social media offer a glimpse at what the gardens have to offer, with some comparing them to scenes from Jurassic Park.

'Such a great perspective of this awesome place. The possums waking up at dusk and crawling up the vines is so great,' one person wrote under drone footage of the sinkhole. 

The sinkhole was created when the top of the cave's chamber collapsed, with gardens opened there by Scottish emigrant farmer, James Umpherston, in 1886

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'This is so beautiful,' said a second, while a third dubbed it 'spectacular'.

Others warned that the steps leading out of the sinkhole are 'really steep' and may not be suitable for the elderly, injured or anyone with physical disabilities.

The sinkhole is just one of many Australian attractions drawing droves of visitors as holiday-starved residents search for domestic distraction while international borders remain closed.

Four and a half hours' drive northeast of the sinkhole, an enchanting lake that glows fairyfloss pink is luring travellers to a remote part of 'Victoria's own Outback' that was once home to a cavernous salt mine.

© Provided by Daily MailThis enchanting lake that glows fairyfloss pink is drawing travellers to a remote part of 'Victoria's own Outback'

Lake Crosbie in Murray-Sunset National Park, northwestern VIC, may be about six hours' drive from Melbourne, but the sight on arrival will not disappoint.

A natural phenomenon that only occurs with the right balance of salt, sunlight, high temperatures, low rainfall and algae causes the water to turn from glistening white to a rose-hued pink.

Famed for being untouched, Lake Crosbie is similar to a lake at Melbourne's Westgate Park and the iconic Hutt Lagoon, a spectacular site six hours' drive north of Perth that's quickly becoming a 'must-see' destination on Australia's west coast.

Lake Crosbie's captivating colour is largely created by the salt mine relics and mounds of salt which have lain abandoned on the water's edge since operation ceased in 1979. 

© Provided by Daily MailLake Crosbie in Murray-Sunset National Park, northwestern Victoria, may be a six-hour drive from Melbourne, but the sight on arrival will not disappoint

© Provided by Daily MailAptly named, Murray-Sunset National Park is the perfect vantage point to take in some of the finest sunsets in the world

Due to the remoteness of the area and a lack of phone reception, a travel advisory notice on the Parks Victoria website warns that campers must be self-sufficient by carrying all the water and provisions they need.

Aptly named, Murray-Sunset National Park is the perfect vantage point to take in some of the finest sunsets in the world.

Lake Crosbie is just one of a series of mesmerising pink lakes drawing tourists to the area, along with lakes Becking, Kenyon and Hardy.

Two hours' drive south is Lake Tyrrell, Victoria's largest salt lake which attracts visitors from around the world as a site for star-gazing.