This viaduct serves as a reminder of World War II.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

The telescope that discovered Neptune.

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

Go surfing on this urban wave, "hacked" by local surfers.

As lake waters recede, a German village reemerges after more than a hundred years.

Medieval ruins on a tiny island amid a flooded lake offer romantic respite to lovers seeking privacy.

This proud Teutonic warrior rises out of a German forest heralding a victory and measuring lightning.

According to a satirical conspiracy theory that persists today, this German city of 300,000 is a hoax invented by the CIA.

The Bauhaus-style former industrial complex is considered the world's most beautiful coal mine.

A bit of retro transportation flair preserved in the world's largest department store.

The rough and tumble president's childhood home displays the shirt he was once shot in and the speech that saved him.

A ruined castle stands atop a hill surrounded by dragon lore.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

This "floating railway" is one of the world's oldest monorail systems.

Be it nature, art, or abandoned military architecture this eclectic German "museum" has you covered.

Twisted buildings adorn the banks of the Rhine river.

This futuristic German television spire is actually the world's largest digital clock.

Between Neo-Pagans and Neo-Nazis, these strange rock formations have a curious cult following and a very strange history.