Tangier the door of Africa
If you're traveling in Spain and have never been to Morocco, don't let the opportunity pass you by! From Tarifa, there's a link by fast ferries every hour and it takes only 35 mn to arrive to Tangier(the perle of Morocco); the ideal is to arrive in the morning and return back at the afternoon.
A guided walking tour visit inside the old city called Medina with its 5 old famous squares, and medieval fortifications, to take pictures with the locals and to visit the Souks (markets) of gold, handi-crafts, food and spices and medicinal plants. Finally stop by a typical restaurant to taste the famous, delicious Moroccan food if you have time for that.