View of the ancient Castelo dos Mouros with its stone tower, Sintra municipality, Lisbon district, Portugal, Europe

photography colour colour image color color image horizontal horizontal image outdoors outside background people incidental people people in the background travel travel destination travel destinations tourist destination view over castle of the moors moorish 9th century ancient castle castelo dos mouros unesco unesco world heritage site world heritage site stone tower sintra municipality lisbon district portugal portuguese europe european building exterior building buildings architecture architectural history historical historic heritage landscape landscapes elevated view fortifications old ruin ruins ruined old ruins remains