A haunted hot springs hotel that went from healing retreat to asylum before it was restored.

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

A crumbling hospital from the 1850s on Roosevelt Island.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

Odd outsider art installations surround a Gold Rush-era ghost town.

This abandoned prison castle has become an imposing gallery of graffiti art.

A Beaux-Arts triumph rises from decades of decay to become the heart of a new innovation district

The former locus of Boston's high culture has been shuttered and buried for over 70 years.

Enchanting gardens surround a derelict mansion, all hidden in plain sight behind a stone wall.

A long strip of fossil-filled limestone makes up this natural bridge above a rushing stream.

One was an astronomer who spent his life chasing solar eclipses, the other helped make Emily Dickinson famous.

This 20th-century replica of a 13th-century castle has itself fallen into ruin.

Underneath the historic center of Mexico City, the remains of a temple dedicated to the Aztec god of the wind.

In the middle of a New England forest sit the crumbling ruins of World War II-era ammunition storage bunkers.

Near this coastal cave stands a small memorial to the hermit who made it his home for three decades.

A renovated hotel is bringing new life to a nearly-abandoned mining town in Colorado.

This beautiful landscape is the only Sichuan-style garden outside of China.

Though strikingly beautiful, Seattle's other railway station is now largely forgotten.

An unassuming secret door once led to a legendary watering hole.

Atop this arch, during the 16th-century, a sermon was given to those suffering from plague.

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

This striking arch, one of the first architectural elements constructed in Prospect Park, was recently restored to its original glory.

This magnificent arch is all that remains of a former smelt mill.