A vast maze like cave that runs through the entirety of the largest mountain in the circle surrounding the forest oasis. With only one known entrance into the mountain is through the Kumite District, it serves perfectly as an exam grounds for aspiring shinobi. Much of the wildlife inside has remained unharmed and untouched in regards to village expansion. Filled with hidden caverns, several inside waterfalls and streams, and even a little plant life; the Proving Mountain is both a beautiful wonder to behold and a deadly place to traverse. New species of animal are sometimes discovered here, as well.