Deadly forests, haunted houses, and mountains where visitors never return alive; a look at what constitutes an evil place and whether these locations are imbued with dark energy that is currently beyond understanding.

For centuries, archaeologists have tried to unravel the mysteries of how and why certain incredible structures like the Great Pyramid at Giza, the staircase at Loretto Chapel, and Coral Castle were built.

Millions of people around the world claim to have had an encounter with a creature unlike any recognized by mainstream science such as the Mothman, Chupacabra, and Mongolian Death Worm.

Probing the Windsor Hum and Old Faithful; visiting a Venezuelan lake where lightning rains down 300 nights a year; sizing up the massive underground fire that's been burning in Centralia, Pa., since 1962.

Ancient practices such as prayer, blood sports, voodoo and exorcism are often thought to be relics of bygone superstition but there is evidence they have an impact on the physical world.

The age old question of what happens after death and the clues to the answer may lie in unusual cases of near-death experience, reincarnation, and how memories can be passed from organ donors to transplant recipients.