赤岩隧道は三重県北牟婁郡紀北町にある廃隧道。 紀伊長島駅からほど近い。 素掘りの廃隧道が資材置き場に使われており、その先に廃屋や廃車がある。
Akaiwa Tunnel is a waste tunnel located in Kii Kita-cho, Kitamiro-gun, Mie Prefecture. It is close to Kii Island. The digging waste tunnel is used for material storage, and there are abandoned houses and scrapped vehicles beyond that.