These mysterious circular formations are actually remnants of 19th century gristmills.

Thirty creepy ghosts now inhabit this decaying 14th-century church.

A collection of haunted artifacts chronicles the career of the world's most famous paranormal investigators.

This luxury hotel suite is located deep in the bowels of an old mine.

The final resting place of New Orleans' most famous voodoo priestess.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

A popular place to pick up prehistoric coral fossils from the time when Michigan was an ocean.

Thousands of jack o'lanterns light up Halloween at this historic West Virginia home.

A peculiar clock commemorates a historic victory won by ringing the noonday bell an hour early.

A memorial for a young woman and her ghost, which are claimed to have caused countless deathly shipwrecks.

Experience the hysteria of a 17th century witch hunt through goofy reenactments and wax dummies that should probably be burned at the stake.

Everyone and everything one man ever loved and lost, now stare into the East for all eternity.

One part local history, 99 parts gruesome haunted house.

Twelve plaster figures inspired by da Vinci's famed painting haunt the desert landscape above a real-life ghost town.

These unassuming lighthouses have seen the first reading of the Pledge of Allegiance, the first wireless transmission, and more than one mystery.

A preserved block of timber buildings from the city's industrial era in the Middle Ages.

The only international border marker within the United States.

Stone carvings record the Norse myth of Sigurd, providing a glimpse into Scandinavia's transition from paganism to Christianity.

The restaurant keeps a hidden séance room on the second floor and reserves a table for the spirit of the former owner each night.

Brawny guys rolling around in oil is the oldest regular sporting event besides the Olympics.

The 1920s child prodigy author was last seen here at her Brookline home before vanishing at age 25.

Home of the unusual art of water puppetry, one of Vietnam's oldest curiosities.

An impromptu shrine appeared shortly after beloved "Torchwood" character Ianto Jones was killed off the show.