Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

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

A beautiful oddities shop crammed with strange and morbid curiosities.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

An abandoned stretch of highway, deteriorating next to the operational one.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

A toxic ghost town sitting atop a massive coal fire.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

World's first "penitentiary," meant to be humane, drove men insane.

The site of one of history's most indelible and horrific tragedies.

Palatial mansion estate used in films including "Flowers in the Attic" and "The Witches of Eastwick."

Enjoy an overnight at an old haunted B&B site of the Borden family murders.

An abandoned 146-acre summer resort slowly being reclaimed by nature.

Forgotten under the construction of a new urban roadway is a small, abandoned part of town.

This picturesque Victorian ghost town was once a thriving mill community.

This last stalwart of the now-forgotten feminist restaurant movement has been serving food in an activist atmosphere since 1977.

The ruins of an abandoned 18th-century town that is slowly being reclaimed by the forest.

With some 500,000 books across five buildings, this bookstore is a reader's paradise.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

A safe space and resource for anything and everything relating to sex and sexuality.

Two thousand artifacts from around the world collected by one woman who loved to travel.