The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

Little Red Lighthouse under the George Washington Bridge.

Hundreds of glow-in-the-dark objects light up a museum in a historic zinc mine.

A castle inspired by medieval architecture is hidden in the woods of Connecticut.

The place where Samuel "Slater the Traitor" brought the Industrial Revolution to America.

A simple Colonial home with a past haunted by death and madness.

Last residence of H.P. Lovecraft featured in his story "The Haunter of the Dark."

Enjoy an overnight at an old haunted B&B site of the Borden family murders.

Rhode Island's tallest building bears a resemblance to the "Daily Planet" building and has been empty for more than five years.

An unusual library of dead things at the Rhode Island School of Design.

Books bound in human skin and H. P. Lovecraft's letters are among a few of the treasures this library has to offer.

This abandoned ironworks was once the most important military supplier in America.

Home to the abandoned Tioronda Hat Works Factory, this park is a combination of woodlands and marshlands.

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

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

The trials and tribulations of marking Poe's grave.

Once a thriving business district, this former shopping area is now an urban ghost town in the heart of the city.

The site where Poe "in great distress, and ... in need of immediate assistance" likely died.

An eerie, abandoned military base engulfed by nature and graffiti is now home to a local park.

A toxic ghost town sitting atop a massive coal fire.

The Fox Sisters, America's leading mediums in the mid-19th century, possessed a table they claimed helped them "communicate" with the dead.

A room hidden behind a swinging shelf in the children's section.

Home on the Hillside, and home of the first breakfast cereal.

Abandoned for over a century, this chilling train tunnel is now a destination for ghost hunters.