The massive concrete underground water reservoir of the G-Cans system in Tokyo, JapanKeywords:Japan, 日本, Japon, Tokyo, G-cans, 龍Q館, Ryu-Q-Can, 首都圏外郭放水路の龍Q館, concrete, water tank, flood prevention, wall, underground, interior, 地下 Back to G-Cans (首都圏外郭放水路の龍Q館) | Nov 13, 2010 98 mm, 13s, f/11 AFS 70-200mm f/2.8 G Location | |