Tour the luxe "glass cage" that inspired and unnerved the architecture world upon its debut.

This 12,000 year old Iranian cave village has been continuously inhabited for over 3,000 years.

One of the only Florida forts to remain in the hands of the Union all through the Civil War still stands as a historic stronghold.

A jaw-dropping "megalibrary" that turns book-browsing into a geometric adventure.

A Nazi concentration camp and Anne Frank's place of death.

This Pennsylvania cave holds evidence of the oldest known inhabitants of North America.

The site of America's first commercial oil well essentially disappeared after the town went bust.

For just a few bucks, this Iowa funicular will let you feel like an 1800s fat cat.

The highest peak in Northern Ireland is topped with a stone tower and haunting burial mounds.

The house where John Wilkes Booth conspired with his co-conspirators.

This old Estonian mine has been kept like a sprawling time capsule of the local shale industry.

This isthmus in the Bahamas narrowly separates the roiling Atlantic from the cool Bight of Eleuthera.

Hundreds of dwarf beeches create an unusual, haunting forest in the north of France.

A fascinating little museum dedicated to the thousands of chemical substances concealed in our food.

The lush coastal city of Astoria is riddled with forgotten secret sidewalks.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

An inspired museum dedicated to the patron saint of enslaved people, inside the cloisters where he lived and died.

A famed data visualizer's personal sculpture garden is a landscape of modern and megalithic wonders.

This 13th century castle is chock full of ghosts and impossibly rare cows.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

Stroll the grounds built by murder, suicide, and dirty oil money at one of Hollywood's most filmed mansions.

The home of a famed utopian science fiction author has been preserved long after his predicted future in the year 2000.

A former Latvian headquarters of the brutal KGB secret police is now open as a grim reminder of their atrocities.

This 90-year-old building is home to possibly the most New Englandy social club in existence.