From scholastic to sepulchral - now under reconstruction.

This abandoned subway station can still be seen on regular commuter trips.

A dark, dank room in subterranean Manhattan was the site of a ghastly murder.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

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

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

Historical structures and natural wonders await visitors to this preserve.

An abandoned theme park with a strange and tumultuous past.

This railroad overpass is said to be home to a murderous goat-man whose very legend has led to very real deaths.

The world's longest known cave system.

A former 19th-century tavern, famous for its peach brandy and honey concoction.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

A crumbling hospital from the 1850s on Roosevelt Island.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Where America's first doomsday cult awaited the end of the world.

For decades, it has disappeared and reappeared as water levels rise and fall.

Over 100 concrete munitions bunkers are all that remain of a Pennsylvanian village seized by the US government.

An office built to look like a giant basket.

An elegant sandstone stairway built by the WPA still connects two neighborhoods in Akron.

All that remains of a gigantic earth-moving machine.

This schoolhouse for Black American children is one of the oldest remaining in southeastern Ohio.

This pair of eccentric Ohio castles were built by a pair of brothers who wanted to bring a bit of class to the Ohio wilderness.