Tangentially related bit of curiosity - there is a long and narrow pedestrian/cycle tunnel under the Scheldt river in Antwerp. It was built in 1933, and access

Tangentially related bit of curiosity - there is a long and narrow pedestrian/cycle tunnel under the Scheldt river in Antwerp. It was built in 1933, and access is via the original beautiful wooden escalators. Quite a neat bit of infrastructure! https://antwerpexplorer.com/highlights/st-anna-tunnel/ https://antwerpexplorer.com/highlights/st-anna-tunnel/