The 400-year-old remains of the samurai invasion of Korea.

Celebrated example of Ottoman architecture that also served as a site for brutal massacres.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

America's Most Wanted's set resides in this tribute to the history of crime and punishment.

Home to items never before seen by the public.

At 207 feet, one of the world's longest continuous escalators.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

This former monument to an invented Iraqi victory was turned into a military camp during the subsequent invasion.

A Hawaiian stairway to heaven—that you can't climb.

Jule Körner's house full of bizarre architectural details.

What may be America's largest classic video game arcade lurks inconspicuously in a Chicago suburb.

The capital of the Cayman Islands is a center of offshore banking, but gets battered by blistering hurricanes.

An eatery for UFO seekers on the Extraterrestrial Highway.

This research center for rare prosimians is studying how they sleep to help prolong human life.

This smaller cousin of the Forbidden City has gone from ancestral sacrifice to tourist's whispers.

Beijing's expansive subterranean hiding spot now crumbles away as a tourist destination.

The most famous location in China was home to whole dynasties worth of imperial rulers.

A Korean village where times stands still.

Secret North Korean passage discovered below the world's most dangerous border.

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

A colossal floating restaurant built to look like a ancient Chinese imperial palace.

Sparkling, calcite-covered skeletons of children who may have been sacrificed to appease an angry god.

A devastated ruin in the south of Belize where British explorers claimed to unearth the Mitchell-Hedges Crystal Skull.