Derwent Hall packhorse bridge
on the Peak District National Park.
Also known as Slippery Stones bridge.
This 17th century packhorse bridge over the River Derwent was originally located further downstream, but the construction of the Ladybower Dam in the mid 20th century meant that it would be submerged by the new reservoir. The bridge (a scheduled ancient monument) was therefore dismantled and the stones numbered and put into storage for a number of years before it was reconstructed in 1959 at the new site.
See Geograph entry.