In the middle of an abandoned stretch of old Route 50 lies a tombstone that weighs three tons.

A 2,000-year-old Adena burial mound located along a busy street in Columbus, Ohio.

Abandoned former poorhouse, bible college, and haunted house in an Ohio hamlet.

See the nearly two-century-old ruins of pre-railroad America at the former site of a lock on the Ohio and Erie Canal.

A retro walk through the history of the tube.

This lovely university observatory continues to sit abandoned since its potential savior was sent to jail for fraud.

The actor best known for slapstick comedy is memorialized in his home town.

This bridge uses an inverted bowstring truss and is believed to be the only of its kind in the United States.

This unincorporated community in western Ohio got its peculiar name from John "Daddy" Baker.

Jimi Hendrix's legendary recording studio in Greenwich Village.

This Fifth Avenue church has long been the favored worshiping place of Broadway actors and vaudeville performers.

No monkeying around, this fountain was really named after the classic sci-fi film.

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

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.

Commemorating the spot where the famous scientist fed his pigeons.

This study room in the New York Public Library saw the creation of one of contemporary America's greatest traitors.

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

A little lighthouse in New York City, surrounded by mysterious stories of insanity-driven construction.

The end of the 4 Line is also the end of the line for 300,000 souls in one of NYC's most illustrious cemeteries.

This dilapidated castle-like structure overlooks the Hudson River at one of its widest points and was once home to nuns.

A Red Hook dive bar that is holding onto its roots.

A community farm in the midst of the Brooklyn concrete.

During the 19th century, you could pay for violence off a prix fixe menu on this Manhattan street.

Once a popular watering hole among longshoremen and shipyard workers, this neighborhood treasure spans more than 100 years of Red Hook history.