Thousands of coffin-like pillars make up this controversial Holocaust memorial.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

This World War II bunker now survives as a documentation of the Nazi regime and war crimes.

A portable, wooden replica (minus the hyphen) of Hamburg’s iconic crooked coffee shop.

A 12th-century fortress containing some of Berlin's oldest buildings.

The most visited, and possibly most controversial, museum in Germany.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

The small cave that housed Tennessee's "first citizen."

This replica of the Greek structure is in the heart of Nashville.

This award-winning men's bathroom was just too beautiful to not allow women to see.