Rainforest filled with record-holding eucalyptus.

This Australian beach is composed of tiny shells.

Nine limestone rock stacks on Australia's "Shipwreck Coast."

This pair of Australian "waterfalls" appear to be falling straight across the land.

A clear example of the process of erosion in action.

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

Alien rock formations grown from the sands of an Australian national park.

One of the best beaches in the entire world.

Prehistoric park filled with the fossils of dozens of extinct species including Australian megafauna.

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

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

The unique ecosystem atop an Australian mountain is home to some colorful inhabitants.

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

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

This extraordinary geological oddity resembles human-made pavement.

The only pollutant in the clear blue water is sunscreen.

A small, but award-winning beach known for its literally spotless reputation.

An abandoned jewel of a ballroom on the top floor of Australia’s busiest rail station echoes with the sounds of a bygone era.

This dramatic sea spire is home to the world's rarest insect and is part of the lost continent of Zealandia.

Woven tree art gives this towering Australian woodland a touch of mystical whimsy.

An abandoned railroad tunnel is now filled with bioluminescent bugs.

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

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

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