Dilapidated ruins that once treated a notorious young serial killer, currently hosting vandals, squatters, and ghost hunters.

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.

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

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.

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

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

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

An abandoned railroad tunnel is now filled with bioluminescent bugs.

Australian Lake set aglow by Noctiluca Scintillans.

An Australian lake whose pink hue defies scientific explanation.

A Hawaiian stairway to heaven—that you can't climb.

A unique set of caves that spits waves back out into the ocean.

This World War II-era bunker is now packed with posters and props from movies and TV shows filmed nearby.

A priest with no formal artistic training used basic house paint to create gorgeous religious scenes inside this historic church.

This airstrip atoll is uninhabited by humans, but absolutely full of birds.

Try your hand at old-fashioned coffee growing at this museum devoted to one of the world's most coveted beans.

A cooled lava flow from the Haleakalā volcano formed these surreal-looking columnar basalt structures.

This unusual lava tube spouts seawater during high surf.

Get up close and personal with these majestic fish.

Football field-sized microalgae production tanks on the Hawaiian coast create a stunning view from space.