Preveli Beach, often called Preveli Lagoon, Preveli Palm Beach, or Lake Preveli, feels almost unreal: palms, a cool river, and the Libyan Sea meet below the cliffs of southern Crete. You come for the river walk, the swim, and the wild scenery where Kourtaliotiko Gorge opens to the coast.
A day trip from Rethymno is the easiest first pick, because it bundles the long south-coast transfer and lets you enjoy the beach instead of managing the route yourself.