Khaldun
Known as "The Felucca Dungeon", it is located in the southeast section of Felucca in the Lost Lands. Some special mobiles such as Lysander Gathenwale spawn here along with ancient liches and even Tentacles Of The Harrower. This dungeon has 2 entrances. Tentacles Of The Harrower spawn in a small pool of blood located in the dungeon and this is the only place they appear.