The Museo Regionale Archeologico Pietro Griffo holds the finds from the Valle dei Templi excavations and is one of the most important classical archaeology museums in Sicily. The centrepiece is the huge reconstructed telamon — the Atlas figure from the Temple of Zeus — displayed horizontally so you can walk alongside it and appreciate its 7.5-metre height. Around it are arranged grave goods, terracotta votives, coins, pottery, and architectural fragments from across the ancient city.
The museum is housed in a convent building alongside the early medieval church of San Nicola, which is itself worth a few minutes. The collections are well labelled in Italian and English. Allow two hours if you want to read everything; a quicker visit of about an hour will still make the temple ruins much more legible when you return to the park. The museum ticket can be combined with a Valle dei Templi archaeological park ticket.