
Genbudo Park(Genbudo koen)
This cave is designated as a National Natural Monument and is known for its distinctive columnar jointing of basalt formed by lava flows from a volcanic eruption approximately 1.6 million years ago. Once used as a quarry, the stones extracted here were utilized in local stone materials and masonry that can still be seen throughout the city today.
1347 Akaishi, Toyooka City