![Regua-Dam-spillway-in-action-on-Douro-river,-Portugal---aerial](https://v7.cdnpk.net/videvo_files/video/partners1427/thumbnails/BB_53e3b36e-4ebf-4ce2-83dc-f23dc3ecdd6b_small.jpg)
Regua Dam spillway in action on Douro river, Portugal - aerial
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