It would take 35 firetrucks to fill this enormous glacial pothole.

Board a mine car and descend the #190 slope 300 feet underground into the Clark Vein of coal.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

An innovative attempt to break a siege in the American Civil War still scars the earth today.

A desiccated merman and a walrus penis bone are among the oddities in this eclectic collection of shipwreck treasures.

What began as an art installation is now the private drinkhaüs for a brewery's employees.

The historic home still shows the scars from a little run-in with the British in 1813.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

This strange, big-tailed beast became a Pennsylvania town's unofficial mascot.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

The famed amusement district marks the beginning of summer with a wild procession of nautical creatures.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

An oasis of calm amid the chaos of the boardwalk, the museum traces the heritage of this beloved beachside amusement park.

This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.

New York's southernmost subway station is whimsically wavy.

A museum dedicated to the alleged Roswell Incident.

Millions of years of oxidation make a drive down this winding Death Valley road surprisingly colorful.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

Marta Becket's hand-painted theater in the desert.

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

Affectionately known as "Lord Bot," this historic statue has a cult social media following and rightly claims to be “the most metal inhabitant of the Wren Yard.”