Run+city: manhole 4

これが廿日市のマンホール。牡蠣殻が見えますか？

This is a manhole lid in Hatsukaichi. Can you see oyster shell?

Run+city: manhole 1　広島市内／Hiroshima city

Run+city: manhole 3　新潟・南魚沼／Minami Uonuma, Niigata