The graves in Florida's oldest Black cemeteries are marked with shells, stones, and mementos of the deceased.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

A tribute to Ponce de Leon's supposed quest for eternal youth.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

The only subway station in the city that still makes use of gap fillers.

A touching tribute to the "Queen of Soul."

The most confusing clock in New York.

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

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

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

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Holding the most bodies of any cemetery in the United States.

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

Neoclassical bank designed by NY architects Helmle & Huberty.

The highest rapid transit station in the world.

New York's southernmost subway station is whimsically wavy.

Known as the "Forgotten City" it was home to industry, riots, artists, squatters, and to one of the largest single disaster fires in New York City.

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

Sniff the Titan Arum's rotting flesh.

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

Introducing the Green Fairy to her fawning masses.