Welded sphere dropped from space.

An isolated village literally built into the crevices and rock formations of a mountain.

Once an impressive link to Afghanistan’s Buddhist past, now a sad reminder of intolerance towards other cultures.

Holding the most bodies of any cemetery in the United States.

Abandoned bridge hidden deep in the San Gabriel Mountains.

The third largest ship breaking yard in the world has created an eerie shipping graveyard in southern Pakistan.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

A hip bar decorated with walls of golden skulls.

A geological bull's-eye visible from outer space.

Modern museum, designed for Jihadi tourists.

Granite rocks that concentrate waves into powerful jets.

Death road of Bolivia.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

A bike being "eaten" by a tree is the real Vashon legend behind popular children's book, "Red Ranger Came Calling."

Roman ruins top white travertine terraces formed by ancient hot springs.

A valley of unique erosion patterns lends to a view like nothing on Earth.

These azure waters were thought to lead to the Mayan Underworld.

Below a historic English market town lies a secret underground city complete with kitchens, laundries, storerooms, and an underground lake.

The biggest and deepest Cold War bunker open to the public can be found in southeast England.

World's largest crossword puzzle spans the side of a towerblock, its clues scattered throughout the city.

Part of one of the largest flooded cavities on the planet, and littered with prehistoric animal bones.

Come stay at a live-in art installation.

A salt lake dotted with steaming limestone chimneys.