major 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 building capital 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 monument nobody old once one outdoor pleated protection rock route ruin ruins sightseeing silkway sky standi standing stone stronghold tour tourism touristic traditional travel turkmenistan turkmenseljuk unesco view wall walls was which