King Alfred's Tower in Somerset

You're standing on Kingsettle Hill in Somerset, right by the border with Wiltshire, at the foot of King Alfred's Tower. Have a good look at its shape. This tower isn't round or square, it's triangular. Each of its three corners has a round projection. It's built of brick, trimmed with Chilmark stone, and topped with battlements like a castle. It rises about 49 metres.