This 700-year-old storehouse was a POW jail, aviation workshop, and Titanic memorial before becoming a brewpub.

Now a memorial to merchant sailors and Titanic victims, this medieval church was destroyed by bombing raids in 1940.

A half-mile-long stretch of medieval forts built after a devastating pirate attack persists amid the modern port city.

One of the oldest seagoing boats in the world can be found at the Dover Museum.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

Ship-sized kinetic sculptural fantasy.

A discarded movie prop that was the original monolith for "2001: A Space Odyssey."

This unassuming alcove in London’s famous Tower Bridge once served to capture, store, and display dead bodies from the River Thames.

An architectural oddity hides in plain sight on this iconic London bridge.

The Great Fire of London and the regulation of one-way streets both started in this alley.

The commemorative stone column conceals a secret laboratory.

There has been an astronomical clock on this spot since the 14th century.

This environmental engineering marvel keeps salt water from the Elizabeth River.

This striking fort on the Maginot Line looks just as it did after being destroyed in the Fall of France.

Bits of architecture from a town destroyed in World War I now decorate this hotel garden.

The world's largest boar is a huge steel titan found at a French rest stop.

An image of the legendary saint stands in the shadow of a cathedral she liberated.

The "stairway to heaven" lookout tower was built to resist weather, arson, and the laws of physics.

This whimsical statue dumps water on its head to symbolize knowledge flowing into his brain. Or maybe booze.

The Belgian library displays burned books that were salvaged from the fires of both world wars.

A giant bug impaled on a 75-foot-tall needle.

The largest airborne operation in history was launched to capture this bridge.

A set of beech hedges planted in the 19th century forms a tunnel that takes on a different appearance in every season.

Little did a museum know, they possessed the last-known lunch wagon in existence.