(the orange jacket, in the bottom left, is covering my rucksack to stop it getting wet)
Few minutes after from I came off the road and went down a steep hill through grass and bushes, I arrived at the entrance of the cave. According to the information sign, the cave is the ruin of a quarry. I hear people used this quarry from Edo period to 29th year of the Showa period, the stones were high quality and easy to work with. It was dark in the cave, though there were some bright places here and there. Many bats were hanging from the ceiling. The bats sometimes flew around the cave, and there was one bat that squeaked “KiKiKiKi”. There had been no one when I entered the cave, but three peoples including a child, were headed toward the cave when on my way back. I heard there were many ruins of quarries that birthed high quality stones in the Izu area, because the area has useful geological phenomena. Then, I gained a great admiration for the skills of discovery and the abilities of the people of the Edo period.