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

A monument to the man who almost killed Hitler.

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

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

The Midwestern United States' tribute to Michelangelo is a foam statue sprayed with gaudy gold paint.

One of the greatest boxers and humanitarians to ever live chose his hometown as his final resting place.

This railroad overpass is said to be home to a murderous goat-man whose very legend has led to very real deaths.

The largest earthwork effigy in the world.

An unusual, super-sized grocery adventure awaits in an Ohio suburb.

What is it about mushrooms that makes people wish they lived inside of them?

This humble star-gazing center touts itself as the "Birthplace of American Astronomy."

This magnificent Cincinnati graveyard is also a popular public park.

Where beautiful signs live on forever.