Rissne
Rissne is a custom map. Located very far north west of the town Svargrond.
You can access it by entering Thais depot and go down a floor there you will find a teleport.
The Rissne is also home to the Ruins of Rufatin Quest.
Creatures that can be found here:
Centipede, Slime, Wolf, Bear, Rotworm, Carrion Worm, Skeleton, Skeleton Warrior, Ghoul, Crypt Shambler, Bone Beast, Necromancer, Vampire, Mummy, Priestess, Hunter, Poacher, Bandit, Gang Member, Smuggler, Mad Scientist, Dark Apprentice, Dark Magician, Beholder, Earth Elemental, Wyvern, Dwarf, Dwarf Soldier, Dwarf Guard, Minotaur, Minotaur Guard, Minotaur Archer, Minotaur Mage, Orc, Orc Warrior, Orc Rider, Orc Shaman, Orc Berserker, Orc Leader, Cyclops, Cyclops Drone, Cyclops Smith, Tarantula, Giant Spider, Dragon, Dragon Hatchling, Dragon Lord, Dragon Lord Hatchling, Ironblight, Cliff Strider, Hero, Vicious Squire, Renegade Knight, Vile Grandmaster, Dawnfire Asura, Midnight Asura, Noonflare Asura, Duskwind Asura, Bog Raider, Grim Reaper, Destroyer, Elder Wyrm, Undead Dragon, Hellhound, Lost Soul, Betrayed Wraith, Fury, Dark Torturer, Behemoth and Demon.
For more information about where check out Spawns.