The first entry level dungeon in RIFT, Iron tombs is a 3 boss instance and the entrance is north-east of Meridian inside the Freemarch zone. I played as a level 20 Chloromancer Mage, the group consisted of Lvl 30 Cleric, Lvl 18 Rogue, lvl19 Rogue and 21 Warrior.
part 1
Part 2
Part 3