Jason Wolf

Actress Megan Fox has peeked behind the curtain of some of these ancient sites, igniting an insatiable curiosity to learn more about these lost worlds. She embarks on an epic international journey to investigate and find answers to these enduring mysteries.

A look at the hunt for California's Zodiac Killer, who murdered at least five people in the San Francisco Bay Area in the late 1960s and early '70s.

Two brothers, reunited for their father's funeral, stumble upon the entrance to a nearby cave. Here, they are slowly forced to confront the true, nightmarish cause of their father's death. Based on the popular Ted the Caver internet legend.