If you're interested in learning about past civilizations, check out Dolmen Barraca den Rabert. Study its unearthed objects and gain an insight into the cultures and traditions of people from long ago.
You'll have sightseeing choices galore when spending time in Pau. Dolmen Barraca d'en Rabert is a good place to kick off here, but there are many other worthy sights to appreciate. Canyelles Beach, Port de la Selva Beach, and Aqua Brava are not far from the exhibition of human history and and will cap off your day nicely.