A large lake that is one of the few tributaries not running through the Feitas, Ceras Lake is a deep, artificial lake that was created in order to cover up the Ceras Lake Castle by the Sindar. The entire castle was submerged into the water, making it completely undetectable from the surface. If needed, however, the water could be drained or flooded by activating the ruins found in a cave next to Ceras Lake. These Sindar ruins effectively dam the water of Ceras Lake, and are controlled by a sluice gate mechanism inside the ruins.