aerial view of german isar river and forest

river reservoir water reflection tree landscape coast waterway lake sea hill terrain mountain nature shore cliff bay aerial photography view alps bad toelz baierbrunn bavaria bird birdview buildings danube delta drone ecology european flow fly forest from above german germany goose grünwald hydroelectric image isar munich kaiak muenchen overview panoramic park photo pine riverbed shadow shot skyline south spring stone summer town trees comming direction munich flowing through spring