Under the marina reputation Marbella is a small Andalusian town with a good old quarter, and most of what is worth doing here is free and happens along the sea.
Casco Antiguo and Plaza de los Naranjos
The 15th-century square with orange trees and the old town hall, and the whitewashed lanes around it. Free, and best in the early evening once the day-trip coaches have gone and before the restaurants fill.
The Senda Litoral to Puerto Banús
The coastal boardwalk and promenade running west from Marbella's Paseo Marítimo to the marina — flat, mostly shaded in stretches, and roughly an hour each way on foot. It is the cheapest and best way to see how the two halves of Marbella differ.
Museo Ralli
A private museum on the N-340 at km 176 in Urbanización Coral Beach, holding Latin American contemporary art and European surrealism. Admission is free. Open Tuesday to Friday 10:00–17:00 and Saturday 10:00–15:00; closed Sunday, Monday and from 22 December to 31 January.
Avenida del Mar and Parque de la Alameda
A ramp of bronze Dalí sculptures links the shaded Alameda park to the seafront, so you walk from the old town to the beach past a free open-air sculpture collection. Takes ten minutes if you do not stop.
Cabopino and the Dunas de Artola
A protected dune system with a small marina and an old coastal watchtower, about 12 km east of the centre off the N-340. Quieter sand than anything in Marbella proper, and the boardwalk through the dunes is short and easy.