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

Putt your way around Australia in a black light environment.

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

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

Every summer local children form "pysja patrols" to save young birds that have wandered from their nests.

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

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

A collection of outdoor mystical statues paying homage to indigenous Australians and ecological stewardship.

An Australian lake whose pink hue defies scientific explanation.

This former steel and coal plant is now a neon-lit industrial fantasia.

These 18th century gardens tell a rocky story of the son of Odysseus.

Living trees form the structure of an open-air palace.

This historic stone bridge has an entire neighborhood clinging to its sides.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

A striking 12th-century-style castle built on the edge of a cliff.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

Ruins of a German Castle on top of a towering stone pillar.

This Chinese museum proves that it's a watermelon world, we're all just living in it.

The world's longest outdoor escalator takes visitors to the top of China's largest dam and is also shaped like a dragon.

Why walk on this historical site when you can zoom down instead?

One of the most remarkable caves in all of Iceland was created by a once raging river of lava.

This volcanic cave lake is essentially hard proof that Iceland is the most magical place on Earth.

Inside this museum, visitors venture through ghost stories entrenched in Icelandic folklore.