sintra, portugal. aerial top view of medieval moorish castelo dos mouros, world heritage place next to lisbon

castelo dos mouros castle moors europe iberia lisboa lisbon portugal lusitan moorish mountain peak muslim reconquista sintra adventure ancient ruins arab architecture blue sky citadel famous place fort fortification fortress heritage site hilltop historical history holiday landmark landscape masonry medieval moor outdoors portuguese culture scenic stonewalled tower travel destinations walled walls watchtower world aerial top view next tourism vacation terrain rock cliff tree flower town park valley coast village sea