Beneath its regal architecture lie dark stories, including whispered accounts of secret tunnels, unexplained footsteps and voices echoing through locked rooms. Visitors and ghost tour guides report cold spots, shadow figures and strange activity in the old basement cells. Some claim the spirits of wartime POWs and former patients from its time as a rehabilitation center still linger within the walls, Pythian Castle is considered one of Missouri’s most notoriously haunted locations.