You can find the Pit of Saron dungeon within Icecrown.
The coordinates are (52.2,89.1)
1. Forgemaster Garfrost
/i Permafrost hits all in line of sight, stacks frost damage taken. Throws Saronite, avoid this. Stomps & stuns players, forges a weapon increases his frost damage. Avoid frontal cone Chilling Wave. Slows a players movement then freezes & damages them.
2. Ick & Krick
/i Kicks a player damaging & knocks back. Player being pursued by Ick run away. Stand far away to avoid Poison Nova. Run away from exploding orbs. Avoid green toxic on ground. Uses Shadow Bolt.
3. Scourgelord Tyrannus