The Taverley dungeon is a dungeon that can be entered from a ladder south of Taverley. This dungeon is the largest in RuneScape Classic and was added during the introduction of member worlds. A dusty key is required to access the entire dungeon and that key is found by freeing Velrak the explorer in the Black knight's jail. This is the only location to get blue dragon scales needed to make weapon poison potions. Blue dragons are only located here and in the basement of the Heroes' Guild.