Imbarė Hillfort is one of the earliest and most beautiful hillforts in western Lithuania. People lived at the confluence of the Salantas and Pilsupis rivers as early as the late Neolithic period, and in the 1st millennium BC they moved to the hillfort, where they established a fortified settlement. In the 1st millennium AD, a fortified outer bailey grew up next to it, and around the hillfort there was a settlement, temples, and a cemetery. In the 10th–13th centuries, Imbarė was a large Curonian castle. The street system found in the lower settlement suggests that Imbarė already had the features of a town in the early Middle Ages. The name Imbarė was first mentioned in written sources in 1253. It is believed that the castle was abandoned in 1260–1263 during the Curonian uprising. In the 16th–17th centuries, a manor stood on the hillfort, which later moved to the nearby Dvarlaukio Hill. One of the many legends says that the area was named after the daughter of the castle's ruler, Imbarė.