This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

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

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

Elevated freight railway turned wildly successful urban park.

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

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

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

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

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

A crumbling hospital from the 1850s on Roosevelt Island.

A terrific purveyor of natural history objects and curios.

An old trolley bridge was converted into a breathtaking garden bursting with colorful flowers.

Hidden beneath the waters of Lake Michigan rests a perfectly intact ship from the early 1900s.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

Remnants of a Victorian garden feature sitting in public woodland.

An incarceration museum on the spot of possibly the oldest prison in England.

A vast overgrown cemetery, once known as one of London's "Magnificent Seven."

A tongue-in-cheek arcade where the games are based on everyday life.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

A kaleidoscopic warehouse-maze of handmade neon signs.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

Experience the life of an 1800's lumberjack at this interactive museum that is only accessible by railroad.