The prehistoric site of Ca Na Costa overlooks the salt lagoon of Estany Pudent, north-west of Es Pujols. It was discovered in the 1970s and excavations have uncovered a Bronze Age stone circle with tall stones partly surrounded by smaller ones. Nearby is a burial place where human remains have been found. Other finds include axes, pottery and jewellery. Some of the fragments indicate that the inhabitants were trading with Mallorca.