Calah was a city located west of Istar in Lake Istar in the Istar Province of the Holy Empire of Istar. Calah was known as the "boat-city", since it was on an island, but the people lived in their boats that were docked on this island. The city was destroyed when the Fiery Mountain was thrown upon Istar, and Lake Istar was instantly turned into steam. The steam came into Calah, and cooked everyone to death. It is now a ruin below the Blood Sea of Istar in present day.