A symbol for the opposition to nuclear power around the world.

A wall of chewing gum moonlights as collective art.

A daily replay of the experiment that proved the rotation of the Earth.

This elaborate towering structure was once famed for its revolutionary height.

Yo, Adrian!

Herman Melville wrote 'Moby Dick' in this landmark 18th-century house surrounded by farmland.

An eccentric playboy's astounding natural history collection.

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

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

An institution dedicated to the towering buildings that make up skylines in New York City and around the world.

Ride the subways of yesteryear.

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

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

A crumbling staircase in upper Manhattan is all that remains of one of the most important sites in sports history.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

Visit the monolithic tomb of America's most famous general.

Elevated freight railway turned wildly successful urban park.

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

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

A semi-scholarly approach to sex.

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

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

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.