With a height of about 10m, this natural stone bridge was carved out by a long period of wave erosion. It is now connected to land, but there is record of it being surrounded by water as recently as the beginning of the Edo Period. This really makes you feel the dynamic movement of the earth. Daisankyo Rockｓ is made up of basaltic rock formed by volcanic eruption. Created by volcanic activity 30 million years ago and sculpted by the waves, the best way to view this natural rock formation is from a sightseeing boat on the sea.