The Shiminami Kaido is what made me love biking again. 70km of fishing villages with orange stalls, huge factories and vending machines. And the constant shift between endless water and mountain valleys.
It's an unbelievable place. The most striking aspect for me was envisioning how much water this can hold at regular operation (indicated by the higher sign). When I visited it it felt unbelievably like a Half Life 2 map. I'm jealous of the people who get to walk those catwalks