"Jigokudani," located in the northern part of Akiyoshidai, is a must-see spot with the largest number of limestone rocks. Limestone pillars line the entire area, and it has been designated as a special natural monument. When you consider that this place was a coral reef in ancient times and has risen over a long period of time to its current state, you will be overwhelmed by the power of nature. There is a promenade, but even the promenade is filled with limestone rocks, so it's best to wear comfortable shoes for walking.