This American Sycamore was grown from seeds that accompanied the Apollo 14 mission in 1971.

Small caves once used as a hiding place for some of those accused during the Salem Witch Trials.

In the middle of downtown Brooklyn lies a 165 year old secret hidden right below the surface (closed to the public indefinitely).

These World War I shooting range tunnels are now haunted halls of underground graffiti accessed through the roots of a tree.

World's first "penitentiary," meant to be humane, drove men insane.

Buildings that dynamite couldn't bring down were abandoned because of bathroom issues.

Detailed facade of a brownstone in Boerum Hill.

Great place to have a drink and a bite to eat in an atmosphere laden with New York's Bohemian past.

A dilapidated dock tells the story of Titanic's missed arrival.

Amid the marketing blitz of modern Times Square is an elegant holdover from its showbiz glory days.

Small monoliths of several varieties of stone sit alongside a wooded path in the Bronx.

The world's largest kaleidoscope, designed by a 1960s psychedelic artist.

The oldest continuously inhabited street in America.

The filming location of a shark attack in Steven Spielberg's famous shark movie.

A daybeacon pyramid is about all that's left of this island that is said to have sunk due to a pirate's curse.

This nearly endless university hallway is home to a unique sunset known as "MIThenge."

This plaque commemorates the call between Alexander Graham Bell and Thomas A. Watson.

This headstone-like marker inscribed with three words has been an utter mystery for over a century.

This tower commemorates the spot where George Washington hoisted the Grand Union flag.

From bench to vandalism to art, this silly prank seat was funny enough to become permanent.

One man's psychedelic fence is painted with his cacophonous folk art musings on the world.

A home decorated by its owner with eye-catching and captivating assemblages of found objects

The oldest playground in America.

The classic Christmas carol was written at this Massachusetts tavern in 1850.