Little Red Lighthouse under the George Washington Bridge.

This innocent-looking townhome is actually a subway exit.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

A dark, dank room in subterranean Manhattan was the site of a ghastly murder.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

A semi-scholarly approach to sex.

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

New York's oldest magic store.

A crumbling hospital from the 1850s on Roosevelt Island.