SCP-823 is an abandoned theme (amusement) park. Site was abandoned in after several violent events resulting in the deaths of park attendees. A complete list of said events is included in Supplement 823-01-13, "Civilian Deaths Attributed to SCP-823."

SCP-823 was finally abandoned after the events of "Bloody Sunday," when the influence of the artifact in question reached a 20-year peak. Two hundred thirty-one attendees were killed, and another seven injured or maimed. A complete list of casualties is included in Supplement 823-01-14, "Civilian Deaths Resulting from Event 823-99-Euclid," but include: Two (2) individuals, male and female, fused together at multiple points after emerging from the "Tunnel of Love" dark ride. (dead) One individual wearing a "Happy Hippo" mascot uniform, found dead of suffocation. Mouth, trachea, and lungs were discovered to be filled with a fibrous substance later determined to be identical to the stuffing in said mascot uniform. (dead) Fifteen individuals recovered from the "Thriller Chiller" roller coaster, all decapitated by blunt force. Witnesses reported that the deaths did not occur simultaneously, but in groups of two, starting with the front row of seats and ending with the back. Forensic analysis indicates that each set of deaths corresponded to a loop or turn in the roller coaster's tracks. (dead) One individual recovered from under the "Thriller Chiller" roller coaster, dead of broken neck and massive cranial trauma caused by a fifty-foot fall from an inverted position. Individual was seated at the back of said roller coaster, and somehow managed to extricate self from the ride's safety harness halfway through the ride. (dead)