Time Out says
One of the coves close to Cap de Creus
Between Cala Tamariua and Cala Fornells you'll find Cala Cativa, a (very) small virgin beach close to Cap de Creus that's unknown to most people. The best way to get there is via the Camí de Ronda coastal path that goes towards Cala Tamariua or, if you have one, by kayak. If you go accompanied, don't expect to find space for your towel because it's unlikely you'll all fit. What's more Cala Cativa hides an amazing history: the remains of a first-century boat that was transporting 100 amphoras of wine between L'Hospitalet de Llobregat and Narbonne.