San Fernando Cathedral in San Antonio, Texas, USA

By day, visitors flock to the San Fernando Cathedral, eager to check out the oldest standing church in the state and maybe even attend its El Mariachi Mass on Sunday. But a stroll alone on the grounds of this Gothic Revival cathedral at night is more of a dare. In 1936, construction workers renovating the church unearthed bones, nails, and tattered military uniforms near the altar; some believe that they belonged to three fallen soldiers of the Alamo, while others dismiss this as myth, given that the dead were extinguished by fire. This apparently does not deter ghosts from showing up, however: Visitors over the years have reported shadow figures and orbs in their photographs and fleeting glimpses of ghosts in the back of the church itself, including a man dressed all in black and figures in hooded, monk-like garb. (Visitors have claimed they initially thought they were fellow tourists, joining the group late—only to witness them disappear into walls.) According to Haunted History of Old San Antonio the remains of numerous Texans are, in fact, entombed in the walls—which “explains” why mysterious faces have reportedly appeared there.