A short, signposted detour from Florac up onto the eastern flank of the Causse Méjean brings you to Saint-Laurent-de-Trèves, where roughly twenty dinosaur footprints are preserved in a slab of Jurassic limestone next to a tiny ruined church. The footprints are clear three-toed impressions about 30 cm long, left by small theropods. There is a covered shelter over the site and information panels explaining what the landscape looked like 190 million years ago.
About 15 minutes by car from Florac. Free.