Thanedd Island
From Witcher Wiki
The magical Thanedd Island is in the bay northwest of Gors Velen in Temeria, to which it is connected by a bridge. It is primarily the location of the academy for young adepts at magic. Thanedd is divided into three main areas:
All three parts were built by elves and are 'crowned' by Tor Lara. The island itself is hollow, like a shell.
