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

The 28-foot granite map plots the locations of 40 theaters in New York City.

Amid the marketing blitz of modern Times Square is an elegant holdover from its showbiz glory days.

Commemorating the spot where the famous scientist fed his pigeons.

Fake subway tiles were installed to cover a design that resembled the Confederate flag—it's unclear if the resemblance was intentional.

An unassuming secret door once led to a legendary watering hole.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

A WWI fighter plane and turn-of-the-century penny candy shop are among the unexpected features of this Financial District building.

Where now stands a 42-story condominium tower of marble, glass and steel was once the central market of New York’s slave trade.

Possible relics of the ancient Roman city are hidden in this restaurant's façade.

Headquarters of the world's fourth largest Hasidic sect and the first of many "770s" around the world.

This neo-Gothic former auto showroom is one of the few remaining reminders of Brooklyn's "Automobile Row."

A Jewish deli run by Yemeni Muslims in an Afro-Caribbean neighborhood is quintessential Brooklyn.

This family-owned bakery is one of the last places in Brooklyn to sell the Nation of Islam–inspired bean pie.

A pair of gigantic baby heads greet passengers at Atocha Station.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

An ancient Roman theatre restored to its former glory in the Spanish city of Cartegena.

A place steeped in history that may be best known as the set of a 1960 film.

This abandoned viewing platform has become a monument to unnecessary government spending.

This architectural oddity is an oasis of green on the outskirts of Valencia.

From grand battles to daily life, this Spanish museum offers a view of world history in miniature.

Vibrant street art created with mixed media.

With a facade that measures just 107 centimeters, this five-story building is one of the skinniest in Europe.

Over 20,000 sets of spice shakers reveal the surprisingly telling history of our most basic spices.