What was once the largest NFL stadium.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

An abandoned theme park with a strange and tumultuous past.

One of the largest-ever mental hospitals now sits abandoned, surrounded by 25,000 unmarked graves.

Once America’s most beautiful army base, this abandoned military fort on the coast of Monterey Bay has been left to the elements.

This forgotten building was one of the few Philadelphia-area breweries to survive Prohibition.

An eight-sided home built during a brief octagon craze in the 1850s.

An Industrial Revolution-era public work that purified water using nothing but sand.

These abandoned waterworks are crumbling into the Potomac River.

A remarkable time capsule of American manufacturing deep in Maryland coal country.

One of the world's largest automobile junkyards is a unique landscape of metal and moss.

The span is crooked and made from two older recycled bridges.

The deserted railroad town had a last gasp as a ghost town attraction before being abandoned for good.

All that remains of this abandoned coal town is a beautiful, haunting cemetery.

This little gem of Spanish Colonial architecture has been abandoned since the 1950s.

Behind an abandoned storefront is an example of pioneering 1930s gas station architecture.

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

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

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

This old abandoned sign flickers to announce a motel that isn't even there.

An abandoned Cold War missile radar site.

A forsaken wonder in the middle of the East Side neighborhood.

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

A crumbling mountain resort that looks like it was abandoned in an instant.