Archaeological Site of Lago della Costa at Arquà Petrarca: an important village was built on the banks of the small lake at the southern foot of Mount Calbarina, around 2.200 B.C. (Ancient Bronze Age). It was not a pile-dwelling with houses raised on piles stuck into the bottom of the lake; rather the houses were built on a reclamation of fagots and horizontal planks, in order to strengthen the building and lift it from the marshland. This was a type of construction common in wetlands and river banks. With the gradual and generalized abandonment of the pile-dwelling type of construction, the village gradually moved away from the lakeshore to an area of more compact soils, where houses could be built directly on the ground. After that, it continued to flourish for almost a thousand years, until around the middle of the XIII century B.C. (Final Bronze Age). The village of Laghetto della Costa is one of the pile-dwellings which were added to the UNESCO World Heritage Site list in 2011.