age ages ancient architecture bronze castro Celtiberian celtic cidás circular citania citanias cities cividades cliff culture defendable defensive elevation fort fortified hill hill-fort hillfort hilltop house houses iron maritime ocean oval peninsula place refuge rock rocks saavem sea security settlement wall walls water above aerial aeroplane airplane arial below buildings cambodia colors colours conditions country-side distance distant expanse flooding flying foliage formations from-above height high housing landscape looking-down monsoonal movement moving panoramic panoramic-views populated river riverside rural scenery scenic settled settlements shadows sunlight sunshine terrain travel travelling trees vegetation views wet air-travel Asia Bird's-eye view daytime layout neighborhood neighbourhood residential-areas roads roadways roofing roofs traffic bird's-eye-view city city-scape construction multi-storey-buildings neighborhoods neighbourhoods people residents maya Mayan Mexico ruins sky tulum brick castle history monument old Remains stronghold tower building leiria medieval Portugal