The Czech Reservoir
prehrada.hrach.euI was searching for this (ironic) idea, and both DuckDuckGo and Google kept it well hidden.
I thought it was a story submitted before on HN, but it was a comment.
https://news.ycombinator.com/item?id=35501005
Now it is submitted and when I'm searching for it again, it'll be here.
But won't Franz Kafka International airport be flooded?
https://www.youtube.com/watch?v=gEyFH-a-XoQ
(On second thought, maybe that's a good thing).