Not far from these ruins stands the Luginsland, a stronghold with four corner turrets, said to have been built by the burghers in 1367 as a watch-tower against the burg of the Hohenzollerns.
Chillingham Castle is a fourteenth century four corner towered building, constructed around an old pele tower.
In addition to the framing strips, the kit also comes with four corner plates.
You will then need to secure the four corner posts.
When you get to the beach just inflate the pillows, button in your towel (so it doesn't fly away and is easily removed for washing) and add some sand into the four corner Velcro pockets to weigh it down if it's a windy day.