The deepest hole drilled in the name of science, where evidence of Precambrian life was found.

Museum devoted to the artificial language of Esperanto.

A museum glorifying the life of Stalin, located in the city of his birth.

Towering basalt columns, a creation of fire and ice.

Located on 420 acres in the high desert, this spiritual center is dedicated to the "science of the future."

An abandoned Jazz Age dream home and con man's hideout in Death Valley.

Civil War Fort on an island in the Boston Harbor.

A set of ancient drawings in the desert of Peru that are so massive, many of them can only be fully seen from the sky.

An ancient Viking village in North America that predates Columbus by 500 years.

The closest thing to Mars on Earth.

The forbidden island of the Tuscan Archipelago may still contain buried treasure.

The largest self-built castle in the U.S., six decades in the making.

A city built from mud and known as the "Manhattan of the desert."

On the Pakistan-India border the militaries perform an elaborate theater of aggression each and every night.

Before the electric telegraph, a chain of stone towers carried messages across France.

The original film set of Luke Skywalker's Tatooine home from the 'Star Wars' trilogy.

Russian Orthodox church built on an Antarctic island.

Home to the "Circus" trees created by Axel Erlandson.

North Korea's massive "hotel of doom."

A 20-meter (65-foot) robot towers over Tokyo Bay.

Berlin's old airport.

Source for a sizable portion of Egypt's freshwater supply is more than an optical illusion.

Everything from a plane to your own two feet are needed to reach this jungle resort.

An collection of Chinese propaganda posters from 1949 to 1979.