The Scorpius Shrine is found south-west of Ardougne in some crumbling ruins atop a hill. Here the Spirit of Scorpius lurks around his gravestone. There are also some ghosts, grave scorpions, and dead trees, as well as thirteen bone spawns. The Shrine appears to have the symbol of Zaros on it, but it is not the symbol of Zaros.
By talking to Scorpius, players can get an Unholy mould and have their Unholy symbols blessed. A ghostspeak amulet is not needed to talk to Scorpius, but he will only talk to players who have "seen beyond the stars" (finished the Observatory Quest).