This unusually-named reservoir found a second life as a nature preserve.

This airport currywurst stand is made out of retro airplane parts.

An abandoned train station in Munich constructed for the 1972 Olympic games.

The unusually large seat sits atop the base of a ruined temple.

One of the most easily accessible examples of the rare 1960s UFO houses.

This beautiful 19th-century temple stands atop the ruins of its predecessor.

This magnificent museum claims to house the cranium of a disciple and the skull of a pope.

A museum dedicated Germany's favorite drink and most well-known festival.

This striking observation tower shaped like a spinnaker sail is the newest icon in historic Portsmouth.

Surreal riveted sea forts once protected the Kent shores from German attack.

No one is sure what to do with this WWII shipwreck that sits at the bottom of the Thames, still loaded with tons of explosives.

A bronze bust commemorates the heroism of the secret agents who led covert operations against the Nazis.

This pump on the bad side of Victorian London betrayed a horrifying revelation about the water supply.

"We gonna rock down to Electric Avenue, and then we'll take it higher..."

A subterranean playground in an abandoned slate mine.

The grave of Mrs. Reginald Hargreaves, who inspired the tale 'Alice in Wonderland.'

A tiny replica of the iconic London landmark hides on the side of the steel structure.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

On this wooded path, a stained-glass window creates a spellbinding forest cathedral.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

The final resting place to 300 Victorian-era pets hides inside the city park.

The site of London’s first coffee house has been serving refreshments of one kind or another for 360 years.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

Ruins of a German castle on top of a towering stone pillar.