aerial shot over an estuary of blue waters contained by old dams in which you can see coastal birds and on both sides there are green and brown marshes on a sunny summer day in Cantabria Spain

blue waters old dikes coastal birds green marshes brown marshes 2997fps sunny day summer cantabria spain landscape natures panoramic view natural reserve bird watching ecology conservation biodiversity environment aquatic ecosystem bird flight horizon clear sky reflection of the sun aquatic glitter serenity seasonality cantabrian coasts summer plenitude natural beauty delta geographical contours tranquillity riberas tourist destination aquatic flora vibrant aerial exploration natural harmony summer splendor chromatic composition visual respite warm estuary coastal scenery fresh air environmental wealth cantabrian beauty placid observation idyllic setting