whether you want to see how the rich and famous live, admire the boats, buy some Designer shoes (Yes Jimmy Choo has a shop here) or just go for lunch. Puerto Banus is worth going for a day and evening.
Not just the designer shops in the port, but a large Department Store El Cotre Ingles and International Market just above the underground car park
Marbella Old Town,
15 minutes drive, park underneath and visit the little alleyways filled with small shop and restaurants. Then walk down the Avenida Del Mar towards the sea and admire Salvador Dalis statues.