During the late Neolithic and early Bronze Age there were a number of pile dwellings and other settlements around the lakes of the canton. The two settlements at Hurden in Freienbach are part of the Prehistoric Pile dwellings around the Alps, a UNESCO World Heritage Site. The Hurden sites are related to the western Cortaillod culture (c. 4500–3500 BC). Sites on the island of Lützelau and the shore zone at Freienbach are eastern Pfyn culture (4000-3300 BC) and Corded Ware culture (2750-2450 BC). During the Bronze Age several bridges were built between the promontory of Endingen in Rapperswil, St. Gallen and the settlements at Hurden. Over 200,000 posts and seven bridges have been discovered, along with several settlements and ritual sites. On the Schwyz side of the lake, ten different settlements from 4300-2700 BC have been discovered.