The longest escalator in the Western Hemisphere takes over three minutes to ride down.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

A relic of FDR's brief foray into utopian urban planning.

A remote horde of architectural treasures fit for Indiana Jones.

Walk a trail through a historic Quaker town that outlawed slavery in 1777 and was a major waypoint on the Underground Railroad.

An eerie, decaying ghost town destined to fade into the forest.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

A crumbling hospital from the 1850s on Roosevelt Island.

One of only two commuter aerial tramways in the United States.