Little Red Lighthouse under the George Washington Bridge.

Oldest surviving example of a Dutch saltbox frame house in America.

The crown jewel of the Queens Museum is a nearly 10,000-square-foot architectural model of the city originally built for the 1964 World's Fair.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

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

An unassuming secret door once led to a legendary watering hole.

19th century cemetery hidden in Brooklyn's Prospect Park.

Rummage through this sunken ship, but leave your scuba gear at home.

Holding the most bodies of any cemetery in the United States.

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

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

A crumbling hospital from the 1850s on Roosevelt Island.

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

Everyone from Mark Twain to Teddy Roosevelt has a pipe hanging from the walls of this historic chophouse.

The origins of midtown Manhattan's anachronistic wooden farmhouse remain a mystery.

The rough and tumble president's childhood home displays the shirt he was once shot in and the speech that saved him.

Elevated freight railway turned wildly successful urban park.

This impressive mansion in Vinegar Hill has some mysterious details in its architecture.

The oldest living tree in Manhattan comes shrouded in sinister legend.

Abandoned 19th century homes once occupied by naval officers, soon to be demolished.

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

A museum collection honoring the long history of the FDNY is held in a disused Manhattan fire house.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Revolutionary War casualties fill the only 17th century structure remaining in Manhattan.