Perinian Depths

Description
The Perinian Depths were a dungeon in the Sosaria of Ultima III, located north-east of Britain.

The dungeon was one of the first to be explored, and that for good reason. It was the easiest to reach dungeon where the Mark of Kings was available, which would raise the number of levels that could be gained. It was found on the eighth level, together with the Mark of Fire, which would make lava harmless.