A lone historical marker off the highway and scattered debris are all that remain of this Cold War-era missile site.

A 14-foot monument marks the resting place of two of the town's earliest residents—and one unknown soldier.

A double agent hid information for the Soviet Union beneath this bridge for more than 20 years.

A graveyard that dates back over 200 years stands near a busy shopping center.

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

The site of the little-known Pennsylvania battle that sparked the Seven Years' War.

A "house to which to flee" for settlers in colonial Pennsylvania.

Mysterious rocks that ring musically when struck.

The first American woman to win the Nobel Prize in literature came from the foothills of Appalachia.

Outdoor exhibits explore the contributions of European, African, and indigenous peoples to American frontier culture.

A former mental hospital founded in the 1930s by a eugenicist who advocated for the forced sterilization of patients.

One of the last active volcanoes on the Eastern seaboard.

Beyond the usual stories that attend old prisons, this one has deep bloody undercurrents.

The museum calls itself the "National Museum of the Paranormal" and is full of eerie oddities.

Nothing says indulgence like a 1,500-pound chocolate castle.

The highest point in Maryland is only accessible by hiking through another state.

This abandoned train tunnel has been the subject of countless ghost stories for years.

A macabre farm reserved part of its 222-acres for dead bodies, all in the name of science.

Two insane asylum bodies embalmed by an amateur.

The brainchild of Eleanor Roosevelt, her "Little Village" was a collectivist dream.