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

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

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

The largest collection of medicinal plants in Australia is also home to a witch who will show you how to use them.

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 word 'wunderkammer' translates as 'wonder-chamber'. This Wunderkammer is both a museum and a retail store.

The only pollutant in the clear blue water is sunscreen.

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

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

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

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

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

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

Once the path of a railway tunnel, now home to thousands of glowing insects.

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

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.

This "volcanic all-day restaurant" is right on the beach.

The nuns here cultivate silk to weave some of the finest scarves in the world.

A former factory serves as a shrine to the industry that sustained Santorini for decades.

These sea caves are the source of Xigia Beach's distinct aroma.

This beehive tomb built for royalty sat hidden for over 3,000 years.