Grande Dixence Dam

Completed all the way back in 1935, this is the Grande Dixence Dam which holds back the Lac des Dix, a 4 km long lake in the Val d’Hérens, Switzerland. The water mainly comes from the summer melt of glaciers, and is piped here via a system of water supply tunnels over 100 km long. What’s really interesting is that in summer the Lac des Dix can be up to 284 metres deep1 – thanks to the fact that at 285 metres tall, the Grande Dixence is the world’s tallest dam. Update: It turns out that this is…

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