The prehistoric inhabitants of Mukaba (Moncalvo) built a fortified settlement (Italian: castelliere) on the southern hilltop, 121 m above sea level. The hillfort was erected in a strategic position commanding a large part of Lim Bay and the surrounding area. Its southern part has a view of Rovinj, while its north-western side looks towards Vrsar. The shape of the hillfort, which includes two concentric rings of ramparts girding the hill, followed the physical configuration of the landscape. The walls of the settlement were built using the dry-stone technique, with a double wall made of large stone blocks, whose interior space was packed with smaller stones. The stone used for the construction of the rampart was obtained by levelling the hilltop and terracing the slopes. In the mid-2nd millennium BC, the Middle Bronze Age, the settlement was enclosed within the walls perched on a levelled hilltop and on terraces. The 2018 exploratory excavation sondages found a large quantity of fragments of pottery, some of which were decorated. As numerous sheep, goat and cattle bones were recovered, suggesting that animal husbandry was the key aspect of prehistoric economy, whereas red deer, boar and roe deer bones provide evidence of hunting.
There are two stone mounds at the hillfort, measuring 15-17 m in diameter and 2-3 m in height. The northern mound was partly explored in 2021. Preliminary results indicate that it may be what remains of a fortified entrance to the settlement. A modern watchtower (lookout) has been built on the third mound situated on the northern hilltop. It looks likely that two other unexplored mounds were burial sites (tumuli) where distinguished inhabitants of the Bronze Age hillfort were buried.
