An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

The only thing better than tubing down New Jersey's scenic Delaware River is doing so while eating a hot dog from a giant floating stand.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

Take a step into the workshop where Edison and his employees revolutionized the world.

A Mayan village preserved for centuries in volcanic ash.

Military artifacts from the Salvadoran Civil War are displayed in this small but notable museum.

A giant light 13 feet high shines near Thomas Edison's old Menlo Park lab.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

The strikingly modern structure stands out among the brick buildings speckling the Harvard Business School's campus.

Crammed into several rooms of a Staten Island home, this museum is a vodka-soaked paean to the pleasures of drinking.

A world-class collection of mechanical musical instruments and automata.

Eccentric stone cairns built on a public New York City beach.

The remains of a century-old mansion that met a fiery demise years after it was deserted.

Seven people are buried in the middle of what's now a movie theater parking lot.

A playground inspired by differential calculus dangles from the ceiling of the Liberty Science Center.

A unique sculpture park that specializes in the huge and bizarre.