The largest man-made crater in the U.S. marks the spot where we once tested mining with nukes.

Oh, just a motel on the edge of the desert decorated with thousands of clowns conveniently located next to an abandoned graveyard.

One of the best-preserved medieval streets in Europe.

This North Carolina store preserves a historic moment in America's movement for racial equality.

The first integrated firehouse in Atlanta houses a museum on the history of desegregation in the city's fire department.

This remote Montana battlefield is the site of the Nez Perce Flight of 1877.

This mountaintop refuge rehabilitates tigers, lions, bears, and more from illicit wildlife trade—and offers overnight lodging.

The remains of Abó, Gran Quivera, and Qurai are monuments to the long, complicated history of the Indigenous people of the Southwest.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

This restaurant serves wood-fired fare served in a natural cave with a live spring.

Professional and amateur dioramas, taxidermy, and oddities all located in an attic above a gallery.

Twisted trees shaped by coastal winds make this woodland look like something from a spooky story.

This nearly abandoned town was once a thriving mining community until a series of fires.

The old Route 66 town straddling Texas and New Mexico died along with the Main Street of America.

All that remains of this abandoned coal town is a beautiful, haunting cemetery.

This cemetery is one of the last remaining traces of a drowned old Western town.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

A home built with marble tombstones from the graves of 2,200 Union soldiers buried in a Virginia cemetery.

Often referred to as the largest spring in America.

Previously a hot spring, this park remains a site of unique history, wildlife, and geology.

On Waikīkī Beach, a monument to four extraordinary individuals of dual male and female spirits who brought the healing arts from Tahiti to Hawai'i.

Bioluminescence in the reefs of the Maldives causes the sea to glow like a starry night sky.

This ruined fort and statue are a testament to the last king of Kaua‘i’s savvy diplomacy skills, which briefly brought Russians to Hawai‘i.