Grave of the man allegedly responsible for a series of infamous murders in Boston in the 1960s.

Like stepping into a spooky fairy-tale, this shop carries the dark ideas of artists and other makers.

An eccentric inventor's castle home with its own indoor weather system.

A New England ghost town features a trail of boulders etched with intriguing life lessons.

Final resting place of the two women killed on a small island off the coast of New Hampshire.

Stumps of an Ice Age forest, visible only at low tide.

It was an experiment to prove that glacial boulders and rocks can be used in constructions and dwelling.

Final resting places of a husband and wife who became famous for their claims of extraterrestrial abduction.

A quiet spot commemorating two naturalists who had to choose between love and the university at which they both taught.

This historic park site contains the last remnants of a once bustling canal system.

Ruins of a historic medical facility sits eerily by the water.

Beautiful hillside Vermont cemetery with amazing funerary art.

The remnants of a 19th-century ironmaking complex hidden in the woods of Connecticut.

Some of the earliest burial grounds of New York State are to be found hidden away in this quaint town.

An Escher-inspired library dedicated to the wonders of the human mind, yet closed to the public.

This abandoned psychiatric hospital once housed more than 4,000 patients in the middle of a quaint New England town.

Amazing views of Long Island Sound can be seen from this mountaintop tower.

The mysterious headstone of an unidentified bank robber was seen visited, every year, by a woman in black.

An off the grid woodland retreat that harkens back to days long forgotten.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

A rock maze opens up to a panoramic viewpoint at an abandoned mine full of ghost stories.

A beautiful multicolored mound formed by the mineral deposits of the Orenda Spring.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

This abandoned iron furnace was one of the first to use coke—a type of high-carbon fuel—to make iron.