Charles Fort in Kinsale, Ireland

I was able to take this photo by sneaking past a "Danger: Do not enter" sign, blocking off the section of Charles Fort with the best ocean views. Charles Fort, a star-shaped fort occupied by the British army until Irish Independence in 1921, was designed with the goal to protect against those attacking from sea. As a result, the fort boasts thick, high stone walls and an intricate design that accounted for trapping cannon balls that might have been shot off from these ships at sea.