Heftimus Cave

Heftimus Cave is a cavern which appears in Ultima VI and Ultima VII.

Description
Located on the western Valorian Isles, the Heftimus Cave is vast. It is named for its most prominent inhabitant, Heftimus McPry, a penniless pirate who used it as shelter. Within this grotto, one may find numerous supplies in caches throughout the passages, although they are guarded by a variety of fierce beasts.

Ultima VII (SNES)
A dungeon known as "Heftimus" appears in the SNES Port of Ultima VII, and is relatively unique among the dungeons of this game in that is has no special artifact associated with it. Nevertheless, a fair amount of gold and potions may be found within its depths.

Trivia

 * The original entrance in Ultima VI was right next to Jhelom, while in Ultima VII, the entrance got moved to the new western island.