Radiver's Dungeon, also called the Slayer Guild, is a series of caverns that contains high level slayer monsters located directly south of Cardiff. Ranging from Airfiends to even White dragons, this is one of the best and most dangerous places to train Slayer on RuneScape. Please be noted that some sections contains multicombat zones, where multiple monsters can team on you and kill you, which is why it is strongly advised to use the Bank before heading into the caves and take the items you wish to loose.