This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Sniff the Titan Arum's rotting flesh.

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

Ride the subways of yesteryear.

An artist's cute bronze subway sculptures belie his violent artistic past.

Lie in a hammock where George Washington stood.

Elevated freight railway turned wildly successful urban park.

Red frames showcase remnants of one of New York's original subway stations.

The most confusing clock in New York.

Salute the leader of the proletariat.

A terrific purveyor of natural history objects and curios.

Unrepaired walls from a 1920 anarchist bomb attack.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

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

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

The most visited, and possibly most controversial, museum in Germany.

A historic house left in "dramatic still life."

Hear the quietest sound from across the dome.

This one has sailed five times as far as Sir Francis Drake's famous ship.

A little sculpture with a large wardrobe.

Brussels' favorite peeing boy has a sister.

The concrete shell of an industry giant remains as a playground for graffiti artists, auto scrappers, and paintball warriors.