The Blue Boulder is a beautiful hiking and biking area with its canal, old locks and Bailey Bridge. The Bailey Bridge is an emergency bridge laid by the British in 1944. It was designed in 1940, to be built, dismantled and moved in a few hours. It is one of the last original ones from World War II. This type of bridge can span up to 60 meters and is still in use worldwide. The listed old locks are still in use. They are gems of industrial archaeology and span an elevation of about 15 meters over 5 km.
The Bailey Bridge is one of the last original ones from World War II