Investigating mysteries that elude scientific explanation.

Inexplicable conditions and illnesses include cases of mass hysteria and rare syndromes like Stendhal and Munchausen.

Revered religious artifacts from around the world, including the Shrine of the Three Kings, the Ark of the Covenant and the Holy Grail.

A closer look at the awe-inspiring structures that capture imaginations, including the Olmec Heads of Central America, the Alhambra in Spain and Angkor Wat in Cambodia.

Paranormal phenomena that baffle experts around the world, from ghostly encounters and spectral curses to spontaneous combustion and the mysterious Hum.