Lepreon was for Herodotos (4,145-148) the most important of a number of cities founded by refugees from Lemnos, and today the remains of ancient Lepreon are still some of the most impressive in southern Elis (Triphylia). As de facto capital of Triphylia, originally inhabited by the pre-Greek tribe, the Caucones, it fought multiple conflicts with the Eleans in order to gain independence, until the Spartans humiliated Elis to release the dependent cities. . In the Roman period, the city was moribund, only to be abandoned around 800-1000 after a series of pirate raids. On the acropolis you can still find remains of the city wall with towers from Hellenistic times, and an impressive entrance gate, and a little further on a very beautiful Doric temple, possibly the temple of Demeter mentioned by Pausanias.
Pausanias (5.5.5) about Lepreon:
The Lepreots say they had a temple in the city within the city for Zeus Leukaios and a tomb for Lykourgos son of Aleos, and also a tomb for Kaukon. On that grave would also have been a decoration of a man with a lyre in his hands. (6) In my time, there is no longer a notable tomb and no more sanctuary for one of the gods, except one of Demeter. That too was made of roughly hewn stones and no longer had a cult image.