The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

Try not to get slimed in Tribeca.

New York's oldest magic store.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

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

This curio museum seems like the type of place you might find a mogwai or a monkey's paw.

Gutted airplanes slowly decay in a Florida field.

These ruins are all that remain of what a Spanish barrack that likely housed a quarry overseer, masons, and stone cutters involved in the construction of the Castillo de San Marco.

Only through the lens of a microscope can visitors see the true treasures inside this museum.

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

St. Augustine's record-setting narrow street was designed to protect against pirates.

It's a pretty creepy lock-up.

Intertwined, interspecies trees which locals believe can grant boons to lovers.

Arrr! The most authentic collection of pirate artifacts in the world... matey.

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

A saloon and inn that served the Wild West's most iconic figures—and is still haunted by some of them today.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

A haunted hot springs hotel that went from healing retreat to asylum before it was restored.

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

Visiting dignitaries and Hollywood stars once stayed at this 1920s hotel, alongside ghosts that are said to haunt its corridors.

One of America’s oldest and spookiest hotels, thanks to the residency of ghosts, dead presidents, and Alfred Hitchcock.

In the middle of a remote desert town is a surprisingly opulent hotel.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.