hydroelectric dam over the river

reservoir river bridge mountain waterway infrastructure valley coast lake transport hill terrain fjord sea landscape mountain dam valley river-douro electricity hydroelectric river nature landscape carrazeda-de-ansiães fluvial sky green tree perspective lake summer forest mount panorama rock europe tourism dusk navigate water portugal blue douro rural countryside travel mountains altitude natural scenic plants trees list energy renewable turbines são-joão-da-pesqueira trás-os-montes alto-douro vineyards bragança