People who lived in these areas some hundred or more years ago cultivated land daily. Very often they had to take it away from the stone, which they afterwards collected and used for enclosing their plots.
On the solid rock base larger stones were laid down and then smaller ones were arranged towards the top. This explains the origin of kilometres of drystone walls which are a unique sight today. There are coarse ones with uneven sides, as well as those built of smaller stones, whose smoothness will surely remind you of a sculpture.
The Istrian drystone wall indeed is a sculpture, since it embodies the very best of both man and nature.