For decades, it has disappeared and reappeared as water levels rise and fall.

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

This abandoned train tunnel has been the subject of countless ghost stories for years.

This harrowing climb along West Virginia's jagged spires is one of the only Via Ferrata on America's east coast.

These decaying bridges 1,000 feet high are a reminder of the skill it took to cross the Colorado Rockies by rail.

This former fire tower found new life as a communications hub complete with a scenic overlook.

After the comedian dissed a Connecticut town on his show, they named a sewage treatment plant after him.

Protecting the future of some of the rarest and most misunderstood mammals of North America.

Rippling sand dunes frozen in the Arizona rock.

Dramatic river bend surrounds a natural red-rocked pedestal.

Most-visited and most-photographed slot canyon in the American Southwest.

The location where the iconic movie character declared it was time to go home.

An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.

A spiritual vortex among the red rocks in Sedona.

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

The first keystone arch railroad bridges constructed in America.

This sprawling art park is filled with sculptures, nature trails, and art workshops.

A winding, cliffside stretch of road overlooking the Delaware River.

An old trolley bridge was converted into a breathtaking garden bursting with colorful flowers.

Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

This locally-famous crevasse in New York State is icy all year round.

This small Catskills village has six independent bookstores and more bookshops than restaurants.

A peaceful international sculpture garden in upstate New York.

A cabin completely covered in coffee mugs, where visitors are welcome to leave one of their own—if they can find an empty nail.