- The major cultures of Tamriel are thousands of years old, and for all those millennia the wealthy and important have been burying their dead in underground tombs. Over time, some of these have been forgotten—or turned to other uses.
Underground Sepulcher is a tomb that serves as a heist location. You'll be taken here by Fa'ren-dar during the related quest. Several factions can inhabit the sepulcher, including the Worm Cult and the Red Rooks.
Underground Sepulcher hidden rooms
Underground Sepulcher Cave