Paestum preserves three major Doric temples within an urban system of walls, streets, forum, housing and sanctuary. Names changed as scholarship improved; the temples should be tied to archaeological evidence rather than inherited romantic labels.
Velia and the Certosa di Padula extend the UNESCO property across coast and inland. One records a Greek and Roman city associated with Eleatic philosophy; the other a Carthusian institution whose enormous courts, service spaces and land relations evolved over centuries.
The National Park protects biodiversity and a cultural landscape still used by communities. Marine zoning, trail status, wildfire risk and village access are live conditions. Responsible travel slows down and avoids treating protected territory as an unlimited scenic reserve.
Give Paestum a full day, Velia and Padula separate days and choose one coastal and one inland Cilento chapter according to current park conditions rather than trying to circle the entire territory.