“Located in Blue Ash, a suburb of Cincinnati, Satan’s Hollow is an old sewer system that used to house the infamous “altar room” in a mysteriously dry tunnel. A group of Satanists is said to have made animal sacrifices there and opened a door to hell. Female screams can be heard at night and there has been many sightings of various apparitions ranging from floating skulls to demons to an entity known as the Shadow Man.”
“Satan’s Hollow is one of the best known, but least seen, urban legends around here. It is a series of drainage tunnels located in Blue Ash, Ohio, where a group of Satanists supposedly used to meet in some type of altar room, and conduct their rituals. These rituals included holding dark mass, animal sacrifice, human sacrifice, and conjuring. They must have been pretty good, because the legend claims they managed to open a doorway to hell and summon Satan himself. Screams can be heard at night, and there have been many sightings of various apparitions, including floating skulls and a demon, commonly known as the Shadow Man. He is some kind of hall monitor from hell, left here by Satan to guard these tunnels. The shadow man is said to appear in the form of a human, only completely blacked out, hence his name.
While these tunnels certainly are creepy, they aren’t very big. Aside from the area when you enter the tunnel system, you pretty much have to stay hunched over to get through, and they get smaller as you go. The path to the so called Altar Room is a long one, and obviously, since these are storm water drainage tunnels, they are slightly inclined, which makes moving through them even harder. So unless these Satanists are actually the relocated residents of Munchkinville, and strong ones at that, I don’t think they were dragging too many human sacrifices through here. Regardless, by far one the creepiest places around.”
“Satan’s Hollow is located at 4150 Hunt Road. The history behind this little place makes most wonder what there is a tunnel in the middle of the woods over in Blue Ash? If you know the answer you are one step ahead of most people and if you don’t the answer to that question is that the tunnel was part of an old sewer system many years ago. This sewage system went out of service and all the tunnels were abandoned in the woods but now they are used to drain rainwater from the road down to the creek. Some teenagers have found the tunnel since then and have covered it with graffiti and the rumors that ghosts reside here have only made the vandalism worse.”
– Emily Brickler, Cincinnati Haunted Places Examiner
This YouTube video documents one paranormal investigative team’s endeavor into the tunnels.
Satan’s Hollow’s legends are similar to those surrounding the Devil’s Cave in Untermyer Park, Yonkers, NY.