Devil’s Washboard

These are strangely shaped rocks in wavelike formation surrounding Miyazaki Prefecture’s small island of Aoshima. These appeared above the water’s surface due to changes in the undersea rock’s geological features, and their present appearance is a result of erosion from the ocean water. At low tide visitors can enjoy a view of the approximately eight-kilometer shoreline from Aoshima Island to Kinchaku Island in the south. The area was designated a National Natural Monument in 1934.