This "Plant Farm Museum" is home to the divinely inspired and visionary outsider artwork of Reverend Howard Finster.

The 320-year-old tree that greeted General Lafayette and rerouted an interstate highway.

The first presidential bomb shelter was located in an old vault under the Treasury, connected to the White House via tunnel.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

A former Confederate hospital serves as a remembrance of wounded and dead soldiers.

Inspired by a foil-wrapped potato, (seriously) the Markel Building has been deemed one of the 10 ugliest buildings in the world.

Every Christmas, one Arizona city makes the most of its dry climate by creating an arid desert tannenbaum.

Rent out a glass igloo to watch the Northern Lights like you live in the future.

This natural rock "church" might not be a proper chapel but that doesn't mean it's not beautiful.

A popular place to pick up prehistoric coral fossils from the time when Michigan was an ocean.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

Contrary to what one might expect, ice forms inside this small cavern during the summer and melts during the winter.

Four bald cypress trees in Lafayette Square, across from the White House, mark the southern edge of a 100,000 year old cypress swamp.

Living fossils in this remote Australian bay provide a glimpse of what Earth may have looked like 3.5 billion years ago.

This Australian beach is composed of tiny shells.

A small, but award-winning beach known for its literally spotless reputation.

An old California photo stand has been turned into a shrine to the cozy art of crochet.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

Northern Ireland's Brobdingnagian stepping stones.

Like Stonehenge, but with boats and oodles more charm.

A roadside collection of over-sized iron creations that are a bit more macabre than most.