water of the alviela river and weir from its source on olhos d'Água beach, alcanena portugal

water alviela river weir from its source olhos 39aph39 aiexcl gua beach alcanena portugal clear two weirs wall pebbles tranquil shadows summer natural nature flow fresh riverbank trees park scenic destination vacation forest holiday agua garden transparent attraction leaves recreation touristic sustainable tourism travel green foliage countryside village peaceful landscape environment leisure outdoor louriceira portuguese europe