The small cliffside monastery known as the Tiger's Nest is said to be the meditation site of an eighth-century Buddhist master.

This Himalayan airport provides one of the most difficult landings in the world.

This giant Buddha statue has 125,000 smaller Buddhas hidden inside it.

This penis-focused monastery is dedicated to Buddhism's "Divine Madman."

This 17th-century Bhutanese monastery is ensconced in Buddhist legend.

The largest and, arguably, most scenic fortress in Bhutan.

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

Residing along a busy thoroughfare, this sculpture urges passersby to consider the future.

If the tunes of antique organs and musical marionettes don't intoxicate you, the draft beer certainly will.

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

The largest mosque in Germany.

A poignant mural honors the heroic teenage non-conformists who took on the Nazis and paid the ultimate price.

How did a lighthouse wind up in the middle of this landlocked German city?

Largest illuminated advertisement sign in the world.

Twisted buildings adorn the banks of the Rhine river.

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

This mine is home to the largest man-made hole in Europe.

Take a walk in a recreation of ancient Rome.

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

The monumental home of Prussia’s eccentric "Cannon King."

This painted Lego bridge is the product of over a century of locomotive history.

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

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

This red light district plaza memorializes the Fab Four and their historic connection to the area.