between hills and mountains, the hydroelectric dam on the river

reservoir river bridge mountain waterway lake transport infrastructure valley fjord coast hill sea landscape water highland dam river-douro electricity hydroelectric nature carrazeda-de-ansiães fluvial sky green tree perspective summer forest mount panorama rock europe tourism dusk navigate 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 between hills background valeira trás montes