Iwami Tatami-ga-ura

A nationally designated natural monument featuring an expansive wave-cut platform that rose from the seabed approximately 16 million years ago, spreading like a floor laid with tatami mats. A precious geosite where you can directly learn about Earth's history through fossils, nodules (round stones), and flat rock formations that stretch as far as the eye can see, true to its name of 'Thousand-Mat Platform'.