Walkers putting on their backpacks
and enjoying the scenery of the Pembrokeshire Coast National Park may also find their enjoyment of its ancient history is enhanced, after damaged Bronze Age cairns were repaired by volunteers.
A group of 14 students from Pembrokeshire College on an army preparation course carried out work on three burial cairns at the Bronze Age hill fort at Foel Drygarn.
National park authority archaeologist Pete Crane noted the features may have appeared to some to be no more than piles of rock.
"But in fact these huge structures give the fort its name - Foel Drygarn means Hill of the Three Cairns - and give us a real picture of what an important feature this was at least 3,000 years ago," he stated.
Mr Crane noted the area also contains bluestones - which were transported to Wiltshire to build Stonehenge.
Other hill forts walkers may enjoy in UK national parks include Mam Tor in the Peak District and Maiden Castle Hill in the Lake District.