broad view of watch tower of bahrain fort

16th 4000 age ancient arabia arabian archaeological architecture artificial bahrain blocks broad bronze built capital castle century civilization civilizations coral dilmun dramatic dusk dynamic excavated fort fortifications gulf harbour hdr heritage high historical known landmark limestone manama mound old pattern persian place portuguese preserved qalat range reconstructed remains replica restored ruin security site sites sky splendid stone sunset tourist tower tylos unesco view wall watch world years