Get your fix of vitamin D at Playa de Cambriles. Once you've worked on your tan, hang around and watch the sky turn kaleidoscopic with the setting sun.
You're spoiled for sightseeing choice when visiting Lujar. Playa de Cambriles is a good place to begin here, but there are plenty of other worthy sights to enjoy. Calahonda Beach, Playa de La Mamola, and El Lance are not far from the stretch of coastline and and will cap off your day nicely.