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

This abandoned school has had many lives since the early 1900s, and all of them doomed.

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.

An iconic steel and chrome diner from the 1940s left empty for nearly 20 years is in danger of being demolished.

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

The ruins of a 19th century shelter run by the Independent Order of Odd Fellows.

A recently abandoned psych ward at the end of Sanatorium Road.

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

An unrealized Taoist palace left abandoned in a Houston suburb.

An overgrown garden stands as a grim marker of an unrealized dream.

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

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

The old fire tower is one of the last of its kind in the United States.

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

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

A forgotten Cold War relic hidden in the outskirts of a Wisconsin city.