The crew heads to St. Augustine, FL, to investigate a Spanish fort. More than 300 years after it was built in America's oldest city, Castillo de San Marcos is still defended by the spirits of soldiers and haunted by the prisoners once locked inside.

Zak, Nick and Aaron head to Natchitoches, LA, to investigate the Magnolia Plantation. Many slaves labored and died at this cotton plantation, which was built in 1830. The crew looks for evidence of voodoo rituals slaves may have used to seek revenge on the owners.