A look into the world’s most massive underground flood management system, Tokyo’s G-Cans Underground Temple in Saitama. 100s of kilometers of tunnels up to 50 meters underground connecting 5 vast silos and one immense water tank: The Temple, could this be Singapore’s answer to the recent floods? 2 billion dollars and 7 years to build make happy ultramens – see last picture.

Via MichaelJohnGrist