At the time of its construction, the dam at Turton and Entwistle Reservoir was the highest in Britain, rising to a height of 108 ft from its base. It lies in the village of Edgworth and was built to supply water to Bolton. A well-marked path runs right round the reservoir, and the total distance is around 5 km (3 mi). It’s worth noting that the path can get muddy in wet conditions. There is plenty of wildlife to view on the way, including an abundance of waterfowl. Many other adjoining paths lead off into the surrounding woods. On the water itself, fly fishing for trout is permitted.