A submerged archeological park still holds the wonders of a Roman Sodom.

Climb inside an iron crystal magnified 165 billion times its normal size.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

A once-thriving hotel in the Swiss Alps couldn't compete with climate change.

Large Hadron Collider and the Birthplace of World Wide Web.

A series of modernist treehouse hotel rooms grace the outskirts of an Arctic forest.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

This giant boulder is pinched over a 1000-meter abyss by two mountains.

Walk 2,300 feet above the ground on the "Troll's Tongue."

Strange rock formations tower above the river that snakes through this enchanting Icelandic canyon.

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

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

Described as "the world's most blinging pool."

Eurasia's most difficult place to hang out, and farthest point from sea access.

The highest monastery in the world operates a tiny guesthouse with doors open to all.

A lush desert oasis in the shape of a narrow crescent.

Ming Dynasty necropolis raided during the Cultural Revolution.

This short pedestrian span is also known as the "Fairy Walking Bridge" because it looks almost magical.

Massive series of 45 caves and over 51,000 sculptures carved from cliffsides in China.

This Tang Dynasty behemoth is the biggest Buddha in the world.

Mirrored floors and arched shelves create the illusion of an infinite tunnel of books.

This abandoned fishing settlement may well be the greenest village in the world.