World Trade Center memorial likened to a woman's sexual organ.

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

Vacant Beaux-Arts buildings that serve as reminders of a beach town’s glory days.

Rusting away on the edge of New Jersey are the remains of a Cold War missile launch site.

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

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

The remains of a 19th century spring, and the site of an infamous unsolved murder.

This elaborate towering structure was once famed for its revolutionary height.

A monument celebrating the idea of reaching inaccessible places.

Yo, Adrian!

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

Series of storm drains connected to a dark urban legend.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

This legendary "evil" doll has been haunting the citizens of Key West for over 100 years.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

Where manatees are the snowbird vacationers in these balmy Florida springs.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

The only structure left with direct ties to the Salem witchcraft trials of 1692.