When you see it you’ll know why this stronghold on an upland pass has also appeared in Game of Thrones. 

Klis Fortress is balanced on a bluff above the terraced hills of the eponymous town, and is framed by yet more towering cliffs of pale grey rock. 

It’s a sight you won’t forget and blood has been spilled for this structure throughout its two and a half millennia. The ancient Illyrians were the first to build a fortress here and for centuries throughout the medieval era Klis was the seat of the Croatian Kings.