You can still ride this 100-year-old work of art in Brooklyn's largest public park.

A tree that grows parallel to the ground was declared Brooklyn's "crowning curio" by the poet who saved it.

This elaborate tunnel is the first structure composed of cast concrete in the United States.

A vibrant, 100-foot-tall mural dedicated to Evelyn Nesbit, the tragic icon of the Gilded Age.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

Nature puts on a spectacular show at this blowhole on the eastern side of Gran Canaria.

Study the Alien etchings in this fountain while you refill your water bottle.

Commemorating the spot where the famous scientist fed his pigeons.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

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

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.

There must be a pun in this haystack somewhere...

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

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

Currently housing a corporate bank branch this building at the southern tip of Manhattan was once the gateway to luxury vacationing.

This curved Manhattan building was built to house the opulence of John D. Rockefeller's oil empire.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

Supremely flaky treats await at Amadou Ly’s boulangerie and patisserie.

Elevated freight railway turned wildly successful urban park.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

This small beachside park commemorates the possibilities of discovery.

A building so large that it has its own weather.