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

A clock set into the concrete outside a Manhattan jeweler has been telling time underfoot for over a century.

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

A semi-scholarly approach to sex.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

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

Cryptic messages embedded in the New York City sidewalk.