The Iliac Bay is the large bay separating the southern coast of High Rock from the northern coast of Hammerfell. Southwestern High Rock and northern Hammerfell are often referred to collectively as the Iliac Bay region.
For a calculation of the Iliac Bay's size, see here.
The Iliac Bay is fed by the Bjoulsae River on the east, and borders the Abecean Sea on the west. Major islands in the bay include the Isle of Balfiera, Cybiades, and Betony. Notable cities located on its shores are the capital cities of Daggerfall and Sentinel.