Selene's Web is a forest located on the southwestern edge of Reaper's March, in the province of Valenwood. Selene's Web is notorious for being one of the most dangerous regions in Valenwood and for being home to Selene, a Changeling.
Selene's Web is rather large than one can expect. Selene's Web is more known to be located on the southwestern edge of Reaper's March, the border region between Valenwood and Elsweyr. Selene's Web is also known to be located near the city of Elden Root, which is the epicenter of the Grahtwood region, much further away than in Reaper's March. Selene's Web is home to all sorts of creatures, some of which are not seen in other parts in Valenwood, even in Malabal Tor. Giant Hoarvor and the elusive Changelings are known to exist in Selene's Web, making the region very intriguing to the scholars of the Mages Guild. Selene's Web is denser than the other forests and is heavily infested with swamps and decaying plant life.
During the Interregnum in 2E 582, an expedition of Mages Guild members, led by Warlock Carindon, set out into Selene's Web with the help of four adventures led by the Vestige. Deep within Selene's Web, the expedition encountered Selene's followers, ranging from primitive Wood Elves and Khajiits, as well as, the various forms of Selene. Selene's followers were under the control of a Pseudo-Treethane, Treethane Kernin is not considered an official Treethane, like the ones found in Cormount and Woodhearth. After defeating Treethane Kernin and Longclaw, the Senche tamer of the Web, the expedition came across a barrier that took quite some time to take down. Deep in the forest, the expedition was ambushed, leaving only Carindon and the four adventures left. The five fought Selene deep in the forest, and as they were fighting, Selene transformed to all sorts of creatures, until she turned into a Bosmeri Witch, where she was ultimately defeated. Carindon captured her soul and taken it back to the Mages Guild for study.
During the Interregnum in 3E 389 to 3E 399, Selene had escaped the Mages Guild sometime earlier and established a stronghold inside the forest. From there, she took on the appearance of the High Priestess of Shagrath, a God of Spiders long forgotten by the denizens of Tamriel. Word of Selene's cult began to arise throughout Valenwood and into the Kingdom of Elden Root, which was under the rule of Queen Ulandra. Ulandra feared the power that Selene possessed and sought a way to eradicate the woman before she can cause any harm. The Eternal Champion was seeking a piece of the Staff of Chaos in Valenwood and sought out Ulandra's help. She knew the piece's location and would tell them unless they killed Selene and took the Jewel of Selene for Elden Root. The Champion would ultimately defeat Selene and retrieve the Jewel for Ulandra. The Queen pointed the way to Elden Grove, the vast forest of Valenwood, where the piece was.