Ferruccio Barreca Archeological Museum will give you a peek into societies and cultures from long ago. Take your time discovering the revealing artifacts on display.
You'll be spoiled for sightseeing choice when staying in Sant'Antioco. Ferruccio Barreca Archeological Museum is a great place to start here, but there are many other fine attractions to appreciate. Maladroxia Beach, Punta Trettu, and Spiaggia Grande are not far from the exhibition of human history and will fill in your day nicely.