minor kyz-kala, a fortress with corrugated, as if pleated, walls, located in ancient merv which was one of the major cities standi

aged ancient antique architectural architecture asia blue brick bright capital castle central citadel cities cloudy corrugated culture day defense destination empire exterior famous fort fortification fortress heritage historic historical history kala kyz kyzkala landmark landscape landscapes located major medieval merv minor monument nobody old once one outdoor protection rock route ruin ruins sightseeing silkway sky standi standing stronghold tour tourism touristic traditional travel turkmenistan turkmenseljuk unesco view walls was which