Little Red Lighthouse under the George Washington Bridge.

Avoid gangster interaction while window-shopping.

A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.

One of the last Jazz Age "Wonder Theaters" in New York City.

The rough and tumble president's childhood home displays the shirt he was once shot in and the speech that saved him.

A bit of retro transportation flair preserved in the world's largest department store.

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

Oldest surviving example of a Dutch saltbox frame house in America.

A curious friendship between two inanimate ladies.

One of only two remaining Victorian-era greenhouses in New York.

Commonly acknowledged as the only public monument to the Devil himself.

An ancient Egyptian temple in the middle of Madrid, Spain.

Collection of antique science instruments displayed in recreated 1870-1930 laboratories.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Ruins of a once-prized railroad station in New York.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

A popular European tradition makes its way to the states on one of America's most famous bridges.

A modern zoetrope on the New York City subway.

This innocent-looking townhome is actually a subway exit.

Walk into the 19th century without leaving Brooklyn.

A drawbridge named for a potentially intersex Polish national who fought alongside George Washington during the American Revolution, and an example of "Pulaski Red".

A graffiti Mecca welcoming artists from around the world.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

Commemorating the spot where the famous scientist fed his pigeons.