A lush indoor jungle fills this bustling Madrid transportation hub.

One of the largest bamboo bridges in Asia, located right next to a bamboo school.

These broken shards of ancient ruin may hide an ancient pyramid.

A lake with hundreds of ancient skeletons surrounding it. The surprise is what killed them.

Hanging over one of Japan's "hidden valleys," these vine bridges must be remade every three years.

A small Japanese village claims to be the final resting place of the son of God (and God's other son's ear).

The largest lake in the Faroe Islands seems to be held hundreds of feet above sea level thanks to an optical illusion.

Spirits from these lakes are said to produce the local weather and odd phenomena as they bicker between themselves.

Nature’s skyscraper launches out of the terrain with attitude.

The ruins of this prominent glass factory yield hidden treasures buried among the jungle floor.

Elevated freight railway turned wildly successful urban park.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

A cliff-hanging restaurant.

A crypt believed by many Congolese to be a center of black magic.

A part of the world's largest marsh seems to be growing bright red Martian grass.

The cursed island of black pebbles.

The ruins of an ancient island city built atop a coral reef in the South Pacific are spectacular and strange enough to have inspired H.P. Lovecraft.

An ancient stone fortress considered by many to be the eighth wonder of the world.

A Bohemian "anti-hotel" offers off-kilter stays in Sri Lanka.

The attic of a four-century-old canal house hides a clandestine church.

Peek through a transparent pyramid and drink in the mountain made of books.

The souls of the dead have made these Ghanese crocodiles shockingly docile.

This rare volcano spews the strangest and (literally) coolest lava in the world.

A strange rock with a sinister reputation lurks within the crimson waters of this Scottish glen.