This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

The largest dune field in the Mojave offers a chance of hearing the 'singing sands.'

Burping, gurgling geothermal mud pots by the Salton Sea.

A hand-built folk art installation covered with messages of God's love.

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

Along a California highway is a kind of Jurassic Park made of metal.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Version of the French Riviera destroyed by the sea.

The ghostly remains of an accidental sea.

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

When Motown musicians came to Nashville in the 1960s they stayed at this historic record-pressing company because hotels wouldn't host them.

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

At 135 years old and counting, this historic print shop is heaven for poster nerds and music buffs.

This North Carolina museum is keeping the pinball craze alive, with a little Space Invaders on the side.

The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

A humid oasis combines recreation with exploration in a unique underwater cavern.

Enormous lake at the bottom of a unique cave system.

Bananas are often left for the first monkey America ever recovered alive after being launched into space.

This historic train station has been converted to a locomotive themed hotel.

The secret city built by the Manhattan Project.

A vision of beautiful Hindu architecture in the middle of the American South.

Playable, historic pinball machines fill this Alameda museum.

This (occupied) house is 10 feet wide and full of spite.