As the tour continues, prepare to encounter the tale of the Black Dog of El Escorial, a spectral hound that haunted the monastery's construction site. This ghostly figure, as dark as coal, would appear and vanish at will, lurking in the mists and terrifying workers. Even King Felipe II was said to be troubled by this ominous creature. Alongside these haunting stories, you'll hear about other fascinating mysteries of El Escorial, including tales of hidden treasures and ghostly apparitions. Don't miss this chance to delve into the darker side of El Escorial's history. Book your spot on the Free Tour of Mysteries and Legends in San Lorenzo de El Escorial and embark on an unforgettable journey through history and myth!