The real "father of baseball" rests in Brooklyn.

This controversial statue has migrated twice in its life.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

An homage to Jackie Gleason's bus-driving character from 'The Honeymooners.'

Commemorating the spot where the famous scientist fed his pigeons.

A commemorative plaque hides a door that leads down to the New York Public Library's underground book bunker.

The oldest Dutch colonial stone house in New York City is a hidden gem on the border of Brooklyn and Queens.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

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

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

America's greatest forgotten garden and the former stomping grounds of Son of Sam.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

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

A beautiful multicolored mound formed by the mineral deposits of the Orenda Spring.

Once a sewer culvert, this road tunnel now offers cyclists and pedestrians a subterranean stroll under the C&O Canal.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

The world's largest public collection of PEZ memorabilia.

Ruins of a historic medical facility sits eerily by the water.

This water tower commemorates the invention of the transistor on this site in 1947.

An allegedly cursed tree represents a town's reckoning with a racist past.

American involvement in World War I officially ended in 1921 in New Jersey, three years late and thousands of miles from the battlefield.

Historic town settled in the 19th century because of its convenient location along a popular coal transport route.

A giant light 13 feet high shines near Thomas Edison's old Menlo Park lab.

Several times a year, during low tide, two pairs of historic train tracks are revealed on this New Jersey beach.