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

Beneath the mossy overgrowth covering this once-sprawling campus lies decades of history and the secrets that come with it.

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

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

World's first "penitentiary," meant to be humane, drove men insane.

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

Abandoned silver mine strewn with wrecked and twisted structures.

A crumbling hospital from the 1850s on Roosevelt Island.

Abandoned 19th century homes once occupied by naval officers, soon to be demolished.