Rows of grape vines ripening in the sun at a vineyard in the Alto Douro region, Portugal, Europe

travel destination photography horizontal colour image alto douro region portugal europe vineyard grapes outdoors day landscape scenics physical geography non urban scene no people crop cultivated viniculture growth agriculture in a row grape vitis vinifera field abundance hill colour color image color outside tourist destination travel nobody no one no one topography scenery scenic scene scenes picturesque agricultural