Here are two views of Llyn Vyrnwy a reservoir owned by Severn Trent Water, in Powys, Wales. The stone built dam was constructed in 1880 and was the first of its kind in the world.
It was built to supply Liverpool and the surrounding area with fresh water and so over the years I will have drunk my fair share of this water.
The area is a national nature reserve and area of special scientific interest.
I think it is a particularly beautiful spot and a great place for a day out.
