A stray meteor left this picturesque hole in the Australian outback.

A clear example of the process of erosion in action.

The labyrinthine storm tunnels beneath the city of Melbourne are ruled by a band of urban explorers.

A sparkling sandstone cliffside that's worth a visit while it still exists.

Australia's largest traditional hedge maze features a Great Gnome Hunt.

An opal mining town in the middle of Australia where people live, worship, and shop underground.

The tallest sea cliffs on the Southern Hemisphere are a climber's worst nightmare.

This extraordinary geological oddity resembles human-made pavement.

A massive stairway that almost wasn't leads to one of Australia's most scenic vistas.

This gracefully curving formation looks like a massive wave that was suddenly turned to stone.

A castle hand-built by a Spanish dreamer in the Australian tropical jungle.

Nature is leading a successful mutiny on this century-old freighter.

Australian Lake set aglow by Noctiluca Scintillans.

An abandoned railroad tunnel is now filled with bioluminescent bugs.

An Australian lake whose pink hue defies scientific explanation.

Though considered an eyesore by some, this boxy Brutalist high-rise plays a significant role in Sydney's past.

People can't get enough of these adorable Japanese photobooths.

Cockatoo Island is a Heritage-listed island in the middle of Sydney Harbour.

This secret Australian garden was built on love after a man planted a random bulb he found in the ocean.

Come for the flowers, stay for the bats!

A collaboration of art and ornithology mourns the calls of Sydney's lost birds.

Australian museum dedicated to human health and lack thereof.

Built over an abandoned train yard, this hidden gem is full of winding paths and offers gorgeous views of Sydney Harbour.

Beijing's version of Disneyland, completely abandoned, mostly destroyed.