An old abandoned mining town in The Adirondacks where Theodore Roosevelt first learned of the shooting of President William McKinley.

An abandoned quicksilver mining town surrounded by the Big Bend parks.

An abandoned movie set in the desert of West Texas.

Abandoned silver mine strewn with wrecked and twisted structures.

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

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

A small flooded ghost town with a few scattered structures remaining.

Ten 25-foot-tall, beehive-shaped kilns, abandoned in Death Valley.

Remnants of a storybook amusement park hidden behind a strip mall.

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

A stunning, abandoned limestone quarry in southern Indiana provided the stone to erect the Empire State Building.

A labor of love built by local hang-gliding enthusiasts, this ideal launch spot was outlawed by the authorities and has since been largely abandoned.

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

A late sculptor's last project was to turn this abandoned cement factory into a castle-themed amusement park.

Abandoned Coast Artillery fort now serves as graffiti canvas and sightseeing vantage point.

An abandoned relic of the city's failed experiment with below ground transit.

An abandoned munitions factory with a shot tower continues to wage war on the surrounding environment.

A Bicycle Path in the Sky.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

An abandoned guano-mining city in the South Pacific.

A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

Undone by Prohibition, this abandoned brewery-turned-flour mill is now ready for its third act.

A pier that used to act as a busy ferry dock is now a decaying favorite of local fisherman and urban artists.

A ruined mansion hidden in the woods of the Hudson Valley, home of a tragically doomed romance.