Tarn Hows is a very popular Lake District attraction close to Coniston and Hawkshead.
What is less well known is that the tarn used to be three smaller ones called High, Middle and Low Tarn.
In 1862, James Marshall gained the land and set about building a dam to raise the level.
This along with other landscaping largely created the Tarn Hows we see today.
Later he sold it to Beatrix Heelis, better known as Beatrix Potter, who eventually passed it to the National Trust for safe keeping.