The creepy story of San Antonio's haunted Gillespie Mansion Did this horrific night really happen? Camille Sauers FacebookTwitterEmail Photo of the ruins of Gillespie Mansion taken in 1983. Courtesy of Deborah Moore Wolff Every week, we explore a different Texas ghost story or venture into the unknown. This week, we tackle San Antonio's famous haunted house, Gillespie Mansion. The gruesome story surrounding the stately looking Gillespie Mansion, once a dwelling in San Antonio's North West side, is at its core a classic haunted house tale. Depending on where you zoom in, it also sets the scene of a cheesy '80s horror movie.