The Suichoen Ruins are a 20,000-year-old stone tool-making studio that was discovered in the center of Habikino City during an excavation survey in 1992. Over 30 stone tool-making sites have been found at the site, along with approximately 20,000 stone tools and stone fragments made from sanukite, a stone that is easy to work with. In 1998, the site was developed into a park, and the observation terrace and educational facility now feature videos and exhibits that introduce the conditions of the area 20,000 years ago. At the entrance to the park stands a large, sliced egg-shaped monument themed on the sanukite that was broken to make stone tools. It is said that when you enter, you can hear the mysterious sound of sanukite. "Photo provided by Habikino City Board of Education"