The oldest certified bowling alley in the United States is in the basement of this century-old bar.

A forgotten Cold War relic hidden in the outskirts of a Wisconsin city.

Phil Mortillaro uses keys to bring art back to the Village.

The name of this tiny pocket park tucked between two buildings on Manhattan's Upper West Side is Latin for its location: "seventy-one."

Avoid gangster interaction while window-shopping.

Love, knishes, and best wishes from this legendary Lower East Side bakery.

A living archive of urban activism and space reclaimed.

One of the last Jazz Age "Wonder Theaters" in New York City.

The beautiful tunnel that ran from the lobby to Penn Station is still hidden underneath 34th Street.

This semi-hidden Manhattan restaurant is based out of a loading dock.

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

The oldest surviving synagogue in New York City is now a soaring art space.

The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.

From scholastic to sepulchral - now under reconstruction.

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

Read a book next to a Midtown waterfall.

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

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.

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