The Roman Ruins Baelo Claudia are well worth the drive ... located on the Costa de la Luz, approx. 15km north of Tarifa. The ruins date back from the 2nd century BC and are well preserved. There is a visitors centre which at the last time of checking was open the following times (please check on the Internet before making the journey):
Tuesdays to Saturdays: June to September 9am to 8pm, March, April, May and October 9am to 7pm, From November to February 9am to 6pm.
Sundays and holidays all year round: 9am to 2pm
Mondays: Like many monuments in Spain it is closed on Mondays.