Another great feature spotted in London this week. This tower is one of the instillation's dotted around London as part of the London Architecture festival. The tower has winding stairs inside that lead to a comfy lounge/den with a large panoramic window. It was designed for public beaches where you could enjoy the great views but would get you away from the crowds. What a great idea for your yard - small footprint takes up little room and gives you views over fences or walls. Not sure whether the neighbours would be too keen.