Kiyotsukyo Gorge is one of Japan's three major gorges. The towering cliffs along the Kiyotsu River form a majestic V-shaped valley, and the spectacular columnar jointed rocks and sparkling emerald-green stream are a must-see. The Kiyotsukyo Tunnel is 750 meters long, and you can view the beauty of the gorge from three observation points and the Panorama Station (Water Mirror) at the end of the tunnel. You can enjoy the seasonal scenery, including the soft new greenery of the gorge, the cool stream, the vibrant autumn leaves, and the winter scenery that resembles a sumi-e painting. There is also an exhibition corner inside the tunnel that introduces the natural beauty of Kiyotsukyo Gorge and the seasonal scenery.