Quagmire is a realm of Oblivion, created and ruled over by the Daedric Prince of Nightmare, Vaermina. It is a realm of horrors, where reality shifts upon itself in seemingly impossible ways. Every few minutes, lightning flashes and the realm morphs into a terrifying scene, each one more frightening than the last.
It is the realm most often visited by mortals. From her citadel in the center of the realm, Vaermina reaches out into Mundus and collects the memories of sleeping mortals, leaving nothing but visions of horror and despair. These experiences, known as nightmares, involve the mind of a mortal traveling to Quagmire. Through magical teleportation, it is possible for a mortal to enter Quagmire while awake, as was done by the mage Morian Zenas.
Quagmire and Mundus have been known to partially merge where Vaermina's influence is strong, usually in the area surrounding one of her artifacts. In 3E 433, the Orb of Vaermina was stolen by the wizard Arkved, who brought it to his tower in the Nibenay Basin. The interior of the tower seemed to enter Quagmire, with reality becoming warped inside. In 4E 201, the town of Dawnstar was plagued by continuous nightmares due to the close proximity of the Skull of Corruption.
 Quin'rawl Peninsula
The Quin'rawl Peninsula is located in the southern portion of the province of Elsweyr which juts out east into the Topal Sea. The city of Senchal and the Halls of the Colossus are the main landmarks here.