the dam and reservoir were named after a large natural pool in the river that was once located above the present dam site. from there they moved to , and blocked the traffic. visitors are allowed to go up to the cannon point and look through the spy holes. after formation of the giant cells, gall development occurs though these two events are separate. the early instruments were nicknamed "frying-pans" because of their long necks and small circular bodies. a peace-garden with 1,200 maple-trees from gifts symbolizes that peace ought to grow. 