We booked the excursion and visited the top of The Rock via cable car. We spent time with the apes and visited the caves. The excursion was good value at 36 Euros per person but you can also do a similar trip via taxi. Our guide was very knowledgeable and kept us entertained throughout.
We took the shuttlebus to the Centre of town. We had originally booked a tour but it was cancelled as there were not enough English speakers so we took the shuttlebus to the centre of town and did some shopping in the Spanish sun.