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

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

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

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

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

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

The "Seinfeld" diner.

A dilapidated dock tells the story of Titanic's missed arrival.

A semi-scholarly approach to sex.

A modern addition to the Greenpoint skyline.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

Try not to get slimed in Tribeca.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

Less a museum than a bizarre fantasy world created by artists and engineers.

This beautiful stone arch bridge wasn't even expected to stand for one day, but people have been crossing it for centuries.

A former plant in one of the hubs of U.S. steelmaking has been turned into this museum celebrating the history of American industry.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

Man-made geyser that rises to the exact height of the Gateway Arch.

Lined with plaques and tributes to veterans, this patriotic street was founded by Mexican immigrants.

Tiny treasures, giant murals, and strange sculptures decorate the windows and doors of this abandoned building.

Steel remnants of a bridge make up a unique sculpture along the banks of the Illinois River.

World's second largest particle accelerator, where nature reveals its secrets.

Arguably the best example of an authentic Dutch windmill in the United States, rivaling its counterparts in the Netherlands.