The team investigates Grand Canyon Caverns in Peach Springs, AZ, formerly a sacred Indian burial site. The guys dodge mysterious rocks thrown at them during the night's lockdown, and Zak has an eerie, one-on-one encounter.

Ghost Adventures investigates a former old folks home & orphanage, with thousands of deaths reported. The guys uncover horrifying tales of the Odd Fellows secret society, which used human remains for their dark rituals.