In Segesta, a fifteen minute drive away, you can admire the magnificent Greek temple. Take the bus up (or climb by foot) to the theater, which in summer is still occasionally used for outdoor performances.
Selinunte, near the seaside village of Marinella, you can visit the archaeological site which includes two reconstructed temples.
The temple valley of Agrigento is a world heritage. It is thé place in Sicily to visit temples. This is a 2 hours drive from Balestrate.
Be sure to visit the 12th century cathedral at Monreale. Next to the cathedral is the monastery with an impressive portico.