Drainage canal in Mitaka, Tokyo with metal supporting braces (ladder over an open channel はしご開渠). See: Walking on water: the underground rivers of Tokyo 東京の地下河川や運河の地図
Drainage canal in Mitaka, Tokyo with metal supporting braces (ladder over an open channel はしご開渠). See: Walking on water: the underground rivers of Tokyo 東京の地下河川や運河の地図