The walls are decorated with whimsical murals painted by the creator of the Madeline franchise.

A crumbling hospital from the 1850s on Roosevelt Island.

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

A terrific purveyor of natural history objects and curios.

Try not to get slimed in Tribeca.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

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.

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

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

A legendary speakeasy bookstore returns from the brink.

One of only two commuter aerial tramways in the United States.

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

Read a book next to a Midtown waterfall.

A hip bar decorated with walls of golden skulls.

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

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

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

All of Chicago's wood-paved streets are long gone but two alleys remain.

A hollow cement depiction of time's inexorable effect on the human body.

A speakeasy takes on Chicago's drinking culture.