Fingerbowl Cave is a sprawling multiroom catacomb located just north of the Imperial City off the Red Ring Road, very close to Aleswell. It is packed with coffins and sarcophagi and is guarded by the undead. In the top level of the cave is a rather brief book titled Advances in Lockpicking which increases Security. There is plenty of leveled loot in the coffins and chests dotted about.