A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

The world's longest known cave system.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.

One person's lost luggage is another person's treasure.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

Home of an evil witch famous within southern folklore.

Enormous lake at the bottom of a unique cave system.

For a time this small Florida town of less than 1,000 residents was the national leader in dismemberment.

The abandoned bathhouse is all that remains of the hot springs considered Florida's original tourist attraction.

A piece of outsider public art accompanied by a strange urban legend.

Bubbling up from deep underground is the warm crystal clear water that fills the Warm Springs Pools, America's oldest spa.

The home used in just a few seconds of film that came to define the setting of a hit sitcom.

Giant novelty guitars now mark the spot where Robert Johnson is said to have sold his soul to the devil.

Better known as the "Body Farm," this unique research facility has been studying how human bodies break down since the 1980s.

This structure among the trees was the result of divine inspiration.

This bridge is haunted by the ghost of a distraught mother.

More than five miles of underground passageways.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

A bizarre roadside attraction and the first instance of miniature golf in the world.