✕The harbour fills with Athenian day-trippers on Saturdays and Sundays in July–August. The cafés are packed, the streets are loud, and the parking is impossible. Visit midweek or in the shoulder season for a completely different experience.
✕The sunbed areas at Marathonas are crowded and overpriced. Walk 10 minutes further along the coast and you'll find free sections with the same sand and the same water.
✕Many visitors stay in Aegina Town and never make it to Perdika. The 20-minute drive to the southern tip is worth it for the freshest fish on the island and the view across to Moni islet.
✕The temple is impressive on its own, but reading about the Sacred Triangle (Aphaia–Parthenon–Sounion) beforehand transforms the visit. The alignment is intentional and the geometry is extraordinary.
✕Most visitors eat pistachios but never visit a farm. The small producers around Aegina Town offer tastings and tours during harvest season (August–September). It's the best way to understand why these pistachios have PDO status.
✕If you're only staying one day, the bus network covers the main sights (Temple of Aphaia, town, beaches). A car adds stress and parking problems without much benefit on a short visit.