A 75ft (23m) section of Hadrian's Wall is being repaired after it collapsed due to visitors walking on it.
Part of the structure at Steel Rigg, which is known as the Clayton Wall, collapsed on Wednesday due to people walking on it or removing stones.
The National Trust, who manage and conserve six miles (11km) of the site, are now repairing and rebuilding it.
Ranger Jonny Tomlinson said repairing the scheduled monument comes at "quite a cost".
He said the National Trust wanted to encourage visitors to view the wall's landscape, wildlife, history and archaeology but they should "refrain from walking on Hadrian's Wall to minimise damage".
The Clayton section of Hadrian's Wall was built in the mid to late nineteenth century by antiquarian John Clayton, who reconstructed a section of Hadrian's Wall to conserve what was left of that area.
Built in the years AD 122-30 by order of Emperor Hadrian, it took about 15,000 men six years to build the Roman frontier defensive structure.
Stretching for 70 miles (118km) from Wallsend in the east, to Solway Firth in the west, the World Heritage Site once marked the northernmost extent of the Roman empire.