An Australian lake whose pink hue defies scientific explanation.

The most alien-looking place on Earth.

This lab's maddening silence is good for business but bad for sanity.

Better known as the "Body Farm," this unique research facility has been studying how human bodies break down since the 1980s.

A ruined hotel with an unlucky history and an eerie present.

Ethiopia's "smoking mountain" is in one of the hottest regions on the planet and is home to two lava lakes.

An optical illusion found amid a logged redwood forest.

Week-long block party becomes a competition for the best decorated street.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

A unique attraction and museum dedicated to exploring iconic roadside structures.

"World's largest scrap metal sculpture" stands in an outdoor sculpture garden in the middle of Wisconsin.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

Snow-capped peaks, colorful waterfalls and stunning vistas on the edge of the Himalayas.

Not one, not two, but three natural bridges remain in this captivating spot post-sinkhole.

999 stairs lead visitors through a massive hole in a mountain known as the Gateway to Heaven.

A downtown park built on top of unclaimed graves.

Mysterious rocks that ring musically when struck.

England's most notorious suicide spot.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

Humble beginnings for one of the world's most famous scientists.

A huge musical instrument played by the ocean.

A 30-acre garden inspired by the principles of modern physics.