17th century architecture Argolis castle defence defense fort fortress Greece hill hilltop historical landmark Morea nafplio old Palamidi Peloponnese power Remains ruins stone stronghold venetian ancient elements Golan Heights hills Israel Mivtzar Nimrod mountains Nimrod Nimrud Qal'at Namrud trees valley view arch blocks capstone entrance wall battlements blue Carlisle cloud clouds copyspace defend defensive England flag flagpole gate grass green moat safe secure sky strong tower walls above attraction cliff distant fields headland keep monument ramparts ruin ruined rural scarborough tourist decay desuetude Greek high Mystras UNESCO World Heritage window