The Water Wall is what is known to the twolegs as a dam. This dam is positioned at the south of the lake and is the main cause for twolegs in the area, coming to visit the manmade creation. The operation of the Water Wall largely influences the depth of the lake, and can cause floods if it suddenly fully opens for no reason. No cat knows what the purpose of the Water Wall is and when it arrived at the territories, but it's seen as a constant.
