Scotland is renowned the world over as a land of dramatic scenery steeped in history, with many ancient castles to explore. However, on a windswept headland in the middle of nowhere is perhaps one of the most interesting and unusual castles of them all. Despite its rather garish, Brutalist style of angular geometric shapes, the “castle” fits well into its surroundings with a tapestry of pebbles and shells etched into the concrete. The interior is equally bizarre. As visitors squeeze through the narrow opening, they will find a small room…