In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A man-made island in scenic San Francisco Bay.

Legendary frontman of the Doors looms in this giant mural by famed Venice muralist, Rip Cronk.

The words of the neighborhood's most famous poets adorn four concrete walls.

Grab a latte at the birthplace of modern American skateboarding.

The decor of this Hollywood movie palace just barely predated the opening of King Tut's tomb.

The ghost town that ended up on Ebay.

Ireland's only cable car once carried livestock across a treacherous strait.

Traveling this mountain pass reveals quaint stone buildings, stunning Irish scenery, and a bridge said to grant wishes.

Not many houses move across borders, this one did it twice.

A reconstructed World War I-era communications array that was once hidden in plain sight.

This building once stood at the center of a butter war.

This residence straddles a border between Belgium and the Netherlands.

The world's first fish doorbell monitors this water passageway.

Exploring the Netherlands’ textile past and future under one roof.

One of the world’s oldest surviving convict prisons, once the scene of daring escapes and riots.

These pastel-colored homes were built when the island of Macau was a Portuguese colony.

The secret centuries-old German cemetery in the heart of the Vatican.

This equestrian statue of Constantine the Great has been the subject of criticism for centuries.

A museum dedicated to the history of the diamond trade in the Netherlands.

Made of 41,900 pieces of mosaic, it took two years to piece together this giant egg.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

Towering basalt columns, a creation of fire and ice.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.