The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

A crumbling hospital from the 1850s on Roosevelt Island.

A terrific purveyor of natural history objects and curios.

A toxic ghost town sitting atop a massive coal fire.

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

California's first suspension bridge.

A replica viking ship from the Chicago World's Fair is still in dry dock in an Illinois park.

A small abandoned and abused cemetery that has become a magnet for ghost hunters.

A former atom smasher turned into an art gallery.

Chicago's largest cemetery is full of beautiful Victorian monuments and more than a few ghost stories.

This morbid, delightful curiosity shop offers everything from animal bones to human teeth.

These abandoned grain silos and tunnels are an urban exploration dream.

A one-armed veteran of the Battle of Waterloo lies in a cemetery for one in the middle of a Chicago scrapyard.

This Cold War missile launch site has been abandoned for 40 years.

In Washington's Yakima Valley lies a town "where dinosaurs roam."

An abandoned network of military bunkers and tunnels open for anyone willing to descend into the darkness.

A nearly abandoned 19th-century town on the Palouse.

The site of the Wellington avalanche, one of the America's worst railroad disasters.

This graveyard contains markers and monuments dedicated to some of the darkest chapters in Washington's history.

This offbeat trailer park is home to vintage peddlers, local artists, indie makers, and more.

A sliver of nostalgia in Seattle's Viretta Park.

Hundreds of hopeful gold miners came here to get rich, but only two years later the small town was deserted.

The illuminated falls are a gem in North Cascades National Park.

This family mausoleum is steeped in symbolism and looks more like a fantasy location than a grave.