An oasis of calm amid the chaos of the boardwalk, the museum traces the heritage of this beloved beachside amusement park.

This iconic tattoo shop has its own onsite museum with artifacts from the early history of modern body art.

The loneliest island in New York.

This empty Victorian manse on Staten Island is said to be haunted but is actually a real life crime scene.

Tucked in a nondescript downtown Brooklyn mall is a bar containing a remarkable turn of the century anatomical wax collection last seen in 1920s Berlin.

A very classy 1920s-era bar right in Grand Central Station.

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

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

Ride the subways of yesteryear.

A hands-on traveling collection of the innovative devices of yesteryear.

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

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

A New York garbage depot holds a secret collection of weird and wonderful refuse.

A semi-scholarly approach to sex.

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

A crumbling hospital from the 1850s on Roosevelt Island.

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

The Belgian royal family's private depot now stands abandoned and forgotten alongside the tracks.

A 20th-century picture show in 3-D.

A hidden art gallery in an abandoned Warsaw fort.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

The sign at the garden gate reads: "These Plants Can Kill."

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.