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

Hidden in one of New York's oldest subway stations is the final remnant of the site of the bizarre Shakespeare Riots.

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

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

Try not to get slimed in Tribeca.

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

A playground inspired by differential calculus dangles from the ceiling of the Liberty Science Center.

This abandoned Poconos resort is haunted by a history of kitschy romance and a violent fugitive.

The final resting place of the Hollywood star who came to a tragic end.

This park contains a number of standing stones meant to heal and inspire.

This disastrous New Jersey safari park saw animal attacks, escapes, and disease before being abandoned.

The remains of a century-old mansion that met a fiery demise years after it was deserted.

Take a step into the workshop where Edison and his employees revolutionized the world.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

Once in a state of dilapidation, this candy-inspired fortress is now being revived.

Tucked behind New Jersey's abandoned Gingerbread Castle lie the eerie ruins of a once-flourishing paper mill.

Once the world's largest reinforced concrete structure, this abandoned bridge now beckons urban explorers.

Local lore claims this park is named after a young woman who jumped off a cliff.

This ominously named New Jersey street seems to be attracting over-the-top legends of its own making.

This hospital fell into ruins after failing to act as the advocate for the mentally ill it was designed to be.

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

A farm in New Jersey grew a most unusual crop for AT&T's testing purposes.

A recently abandoned psych ward at the end of Sanatorium Road.