Gulf of Silver

is a large on the coast of the Land of Mountains. It served as the location for the final battle between Seireitou Hyūga and Ryun Uchiha.

History
The gulf was formerly a large valley lying along the coast of the Land of Mountains. The location was chosen by Seireitou as the place where he wanted to fight his longtime rival and friend, Ryun — a battle which soon turned into a titanic struggle between two ancient forces. The gulf was created in its entirety, however, due to Ryun Uchiha himself using Sage Art: Tailed Beast Susanoo Shuriken. The resulting blast not only leveled the valley, but also connected it to the nearby sea, causing the crater to fill with sea water. Ryun, in the same battle, later finished the gulf's creation by using another enormous technique: Sage Technique: Water Release Wave Erosion Technique.