The Abyss of Graves

 is a Sunless Sea Story Event.

Trigger conditions
 will be triggered by 3 or 4 of the 15 Unterzee abysses when you do the Dive action in the An Abyss event. The abysses leading to  are randomly determined for each new captain.

Story description
Shelves have been cut into the rock walls. Some are large enough to hold ancient, waterlogged ships, crusted with long-dead barnacles. Others are smaller, holding pairs of clay coffins and a smattering of grave goods: jugs and bowls.