Hamburgers are intensely proud of their tunnel beneath the river.

Executed in 1401, Exhumed in 1878, Stolen in 2010.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

Böttcherstraße's bells, extolling Nordic virtues and the great conquerors of the world.

This monument to those fallen in the World Wars is accompanied by a U-boat that Germany bought for a Deutsche Mark.

This contentious squat has stood through fire, violence, and government intervention as a hotbed of leftist protest.

Hamburg's first legal sex work is relegated to a gated street that still does not allow pedestrian women.

Home of the Large Hadron Collider and the birthplace of the World Wide Web.

A mysterious air force base built to resemble a Long Island fishing village.

Tucked in the back of this amazing antique store is an important piece of medical history.

The second-largest (of only two in the world) large particle collider is the underdog of experimental physics.

Try not to get slimed in Tribeca.

The very first subway station in New York City is beautiful, decked out in chandeliers, and ... abandoned?