This simple Manhattan salt house is artfully shaped... well, like a giant granule of salt.

Unrepaired walls from a 1920 anarchist bomb attack.

A well-worn marker in a forgotten alleyway is all that remains of what had been one of Manhattan's most beautiful buildings.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

Currently housing a corporate bank branch this building at the southern tip of Manhattan was once the gateway to luxury vacationing.

The home of the first American-born saint is one of the only curved buildings in New York.

After traveling the world, the last remaining fully-rigged three masted iron-hulled cargo ship in the world found its home in New York.

A giant toy jack made of numerous welded-together fire hydrants.

A gorilla holding a VW Beetle isn't what you'd expect in rural Vermont.

An 18th century fountain and two columns are all that remains of Rome's forgotten river harbor.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

This fortress was built using the last surviving stones from the Lighthouse of Alexandria, one of the Seven Wonders of the Ancient World.

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

An early 20th-century bullring converted into a modern shopping center.

The cedar tree in Highgate Cemetery earned its title by accident.

The London statue that imitates passersby.

A guitar mounted on a wall in Temple Bar honors the Irish musician.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

Decades before the scandal, this staircase on the river was a literal "water gate."

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

A decommissioned military complex that's now a modern industrial park.

This huge, disused viaduct is now a crumbling concrete underworld of covered in years of graffiti.

A commemorative plaque hides a door that leads down to the New York Public Library's underground book bunker.