Lake Generosity once surrounded the Shrine of Sacrifice in north-eastern Britannia, a forested and generally fertile area. It was the third-largest lake of Britannia. However, befitting the virtue of Sacrifice, a drought caused the area to turn dry, creating a large desert. During this process, Lake Generosity evaporated, leaving the Shrine alone in the inhospitable desert of the Drylands.
By Ultima VII, a small climate shift had caused Lake Generosity to partially re-fill, again surrounding the shrine with a small body of water.
Britannia's third large lake, the one-time picturesque Lake Generosity, was a casualty of the great drought of the northeast and is now simply a bed of dry sand.