Poblat Ibèric de Sant Sebastià de la Guarda

Perched above Llafranc, this free Iberian archaeological site dates back over 2,000 years and pairs ancient ruins with a lighthouse and a small chapel — all in one hilltop spot. You get surprisingly good explanations on-site, so you can actually understand what you're looking at without needing a guide. It's the kind of place that feels quietly overlooked, especially compared to the bigger Roman ruins at Empúries nearby, which makes it all the more worth the visit.