cinnamon thoughts.

PingMag — the Tokyo-based magazine about “Design and Making Things” — talked to Joe Nishizawa who took pictures of Japan’s giant underground installations1:
A enormous underground tunnel that runs through 40metres under the Hibiya Junction Tokyo or an underground dome that lies 500metres below deep in the mountains of Gunma…? In Japan unimaginably large spaces underneath [...]

As some kind of a followup to my last post this one is about photos of abandoned forts at sea from the time of the second World War.
The Thames Estuary Army Forts were constructed in 1942 [...]
Their purpose was to provide anti-aircraft fire within the Thames Estuary area. Each fort consisted of a group of [...]

On this Japanese site you find pictures of a hugh sewer.underground infrastructure to prevent floods in Saitama. Sadly I can’t read Japanese but I guess it’s in one of the largest cities in Japan.
According to Wikipedia:
The G-Cans project (首都圏外郭放水路 Shutoken Gaikaku Housui Ro or Metropolitan Area Outer Underground Discharge Channel) is an underground infrastructure mainly [...]