In Oblivion, the Nibenay Basin is a region in eastern Cyrodiil. The northern part of the region encompasses the city of Cheydinhal.
To the east, it shares a border with the Valus Mountains region. To the west, the region is bounded almost entirely by the Heartlands except for a small area in the north that lies next to the Great Forest. The area stretches south as far as the Panther River. The eastern portion of its southern edge abuts Black Marsh, while the western portion meets the Nibenay Valley and the southern portion borders Blackwood.
The Blue Road enters into the region from the west, and the Yellow Road enters from the west and exits to the south.
The region is surprisingly sparsely-vegetated. The south holds abundant Summer Bolete mushrooms and Foxgloves but only Lavender, Monkshood and Bergamot grow much elsewhere. There is also a sprinkling of other plants including Lady's Smock, Ginseng, Flax, Columbine, Alkanet, Motherwort, Peony and Primroses plus a few Nirnroot growing along the banks of the region's many rivers.
Major Cities
* Cheydinhal — The main city in the east of Cyrodiil, dedicated to Arkay.
Villages, Farms, and Settlements
* Cropsford — An under-construction farmhouse southeast of the Imperial City.
* Drakelowe — A farmhouse south of Cheydinhal (quest-related).
* Harlun's Watch — A village south of Cheydinhal (quest-related).
* Knights of the Thorn Headquarters — A house west of Cheydinhal.
Roads
* The Blue Road — Main road from the Imperial City to Cheydinhal.
* The Yellow Road — Eastern road from the Imperial City to Leyawiin.
Bodies of Water
* Corbolo River — A river that flows south from near Cheydinhal into Niben Bay.
* Lake Canulus — A lake to the east of the Silverfish River.
* Lake Poppad — A lake north of the source of the Corbolo River.
* Panther River — A river that snakes through the Nibenay Basin east of Bravil.
* Reed River — A short, north-eastern tributary of the Corbolo River.
* Silverfish River — A river that flows down from the Valus Mountains into Niben Bay.
Daedric Shrines
* Vaermina's Shrine — The daedric shrine to Vaermina, located southwest of Cheydinhal.
Ayleid Ruins
* Hame — A medium Ayleid ruin southeast of Cheydinhal containing necromancers.
* Mackamentain — A medium Ayleid ruin containing necromancers northeast of Bravil.
* Malada — A medium Ayleid ruin far east of Bravil containing undead.
* Nornal — A large Ayleid ruin southwest of Cheydinhal containing marauders and undead.
* Ondo — A medium Ayleid ruin far east of Bravil containing monsters and undead.
* Vahtacen — A medium Ayleid ruin south of Cheydinhal containing undead.
* Wendelbek — A large Ayleid ruin east of Bravil containing necromancers.
Forts
* Arkved's Tower — A large fort southwest of Cheydinhal containing daedra.
* Fort Farragut — A small fort east of Cheydinhal containing undead.
* Fort Aurus — A small fort northeast of Bravil containing conjurers.
* Fort Cedrian — A medium fort between Bravil and Cheydinhal containing marauders.
* Fort Cuptor — A medium fort far east of Bravil containing necromancers.
* Fort Entius — A medium fort far east of Bravil containing conjurers.
* Fort Facian — A medium fort southeast of Cheydinhal containing undead.
* Fort Naso — A small fort south of Cheydinhal containing vampires.
* Fort Sejanus — A medium fort southeast of the Imperial City containing conjurers.
* Sundercliff Watch — A very large fort far east of Bravil containing NPCs and vampires.
Mines
* Abandoned Mine — A medium mine far east of Bravil containing bandits.
* Collapsed Mine — A medium mine far east of Bravil containing bandits.
* Deserted Mine — A medium mine between Bravil and Cheydinhal containing bandits.
* Desolate Mine — A small mine northwest of Cheydinhal containing goblins.
* Rickety Mine — A medium mine east of Cheydinhal containing bandits.
* Squandered Mine — A medium mine south of Cheydinhal containing bandits.
Caves
* Arrowshaft Cavern — A medium cave far east of Bravil containing animals and monsters.
* Bramblepoint Cave — A medium cave east of Bravil containing monsters.
* Cracked Wood Cave — A small cave southeast of the Imperial City containing goblins.
* Crayfish Cave — A large cave south of Cheydinhal containing monsters.
* Leafrot Cave — A small cave far east of Bravil containing undead.
* Lost Boy Cavern — A large cave far east of Bravil containing necromancers.
* Muck Valley Cavern — A small cave between the Imperial City and Cheydinhal containing animals.
* Newt Cave — A medium cave northeast of Bravil containing monsters.
* Quickwater Cave — A medium cave north of Cheydinhal containing monsters.
* Sage Glen Hollow — A medium cave northeast of Bravil containing conjurers.
* Swampy Cave — A medium cave southeast of Cheydinhal containing trolls.
* Timberscar Hollow — A small cave southeast of the Imperial City containing goblins.
* Wenderbek Cave — A small cave south of Cheydinhal containing goblins.
Campsites
* Carbo's Camp — A campsite south of Cheydinhal containing bandits.
* Crestbridge Camp — A campsite southeast of the Imperial City containing NPCs.
* Garnet Camp — A campsite far east of Bravil containing bandits.
* Nayon Camp — A campsite far east of Bravil containing bandits.
* Sercen Camp — A campsite south of Cheydinhal containing bandits.
* Trossan Camp — A campsite northeast of Bravil containing bandits.
* Wind Range Camp — A campsite north of Cheydinhal containing bandits.
