The origins of midtown Manhattan's anachronistic wooden farmhouse remain a mystery.

A little lighthouse in New York City, surrounded by mysterious stories of insanity-driven construction.

A sculptural commentary on capitalism pokes up from the East River.

One of the few remaining American elm trees in New York’s Tompkins Square Park was the birthplace of a new religion.

The most confusing clock in New York.

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

One of only two commuter aerial tramways in the United States.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

Tucked in the back of this amazing antique store is an important piece of medical history.

A crumbling hospital from the 1850s on Roosevelt Island.

These remarkable cascades are the jewels of Upper Tees.

These planks were originally installed to hold the dead.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

A futuristic, brutalist masterpiece that is also strangely prison-like.

This massive monument was unveiled the day Kosovo declared independence from Serbia.

A 11-foot former president stands on a Kosovo street that also bears his name.

Space-age monument to an early 20th-century uprising.

The gigantic skull of a long-extinct species that once roamed the forests of England and Ireland.

A plaque marks the humble origins of an artistic muse who embodied the ideals of Pre-Raphaelite beauty.

This striking statue brings a scene from the African savannah into central London.

Victorian-era Londoners really wanted to believe this 17th-century cistern was actually an ancient artifact.

On this wooded path, a stained-glass window creates a spellbinding forest cathedral.

An incredibly well-preserved piece of ninth-century Viking poop.