The very first subway station in New York City is beautiful, decked out in chandeliers, and ... abandoned?

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

Sniff the Titan Arum's rotting flesh.

Unrepaired walls from a 1920 anarchist bomb attack.

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

Walk into the 19th century without leaving Brooklyn.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Abandoned 19th century homes once occupied by naval officers, soon to be demolished.

Lie in a hammock where George Washington stood.

A dilapidated dock tells the story of Titanic’s missed arrival.

Ride the subways of yesteryear.

A community farm in the midst of the Brooklyn concrete.

A cruise terminal that changes the atmosphere of Red Hook's industrial waterfront.

This micro-industry of Latino cuisine along Red Hook's Ball Fields represents a victory in a food fight with the city.

A working metal shop and venue for outrageous art and music shows in a former cannonball factory.

Holding the most bodies of any cemetery in the United States.

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

London's smallest police station is barely the size of a phone booth.

Copenhagen's celebrated theme park and gardens.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Erotic art covers the walls of the largest ancient pleasure palace.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.