Welcome sign announcing Haverhill, MA, as the birthplace of horror rocker/artist/director Rob Zombie.

This railroad tunnel was once the longest in Massachusetts.

A cave dug by a man directed by ghosts to find pirate treasure.

This miniature feudal castle was built on a whim to honor a US Navy pioneer.

The ruins of a Massachusetts prison farm can still be found crumbling the woods of a state park.

Unlike other abandoned asylums this empty institution welcomes visitors, just don't go in the buildings.

The walkable ruins of an 19th century hotel, destroyed in a horse cremation gone wrong.

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.

Ralph Waldo Emerson spent two years living here decades before it became a Frederick Law Olmsted-designed park.

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

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

A real-life hidden Easter Egg in New Hampshire's capital city

The oldest covered railroad bridge still standing in the United States.

The 92-foot-tall structure is based on the aircraft that carried the first Americans into space.

Maybe the only missile installed in a public park, this Cold War leftover was one of the first to carry a nuclear warhead.

This historic mini-suspension bridge was swept away once but is now here to stay.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

A lonely memorial to the Challenger Space Shuttle, honoring the astronauts who died in 1986.

A cable-suspension footbridge that hangs high above the Mill River.

This rare polygonal meeting house is rumored to be built in a circle so that the devil has nowhere to hide.

Antique gaffe kept in the basement of a small Vermont natural history museum.

The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.

Hell on Earth is actually a small town in Michigan where anyone can be mayor for a day.

The remains of what was once the world's steepest passenger funicular.