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

This recently uncovered ad for Lindsay's run at Mayor in 1965 had been hiding for decades underneath a billboard.

An abandoned gun-funded 19th century utopia.

The legendary court where emerging basketball players gain their street cred.

A terrific purveyor of natural history objects and curios.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

The most confusing clock in New York.

Where now stands a 42-story condominium tower of marble, glass and steel was once the central market of New York’s slave trade.

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.

More gold than anywhere else, ever.

An accidentally hidden library containing the ephemeral history of New York.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

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

A former waterfront market is now in the center of town due to some interesting Boston engineering.

A Hawaiian stairway to heaven—that you can't climb.

A beach made of semi-precious green sand on the Big Island of Hawai'i.

The southernmost point in the United States is a beautiful place to look at but a deadly place to wade in.

Watch the newest land on the planet form before your eyes.

This black shoreline is made up of exploded lava particles.

Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

2300-year-old Roman road connecting the empire.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.