Awesome slice of history. Get the feel of a 1st century Roman fishing village right on the coast of Spain just a few minutes from Tarifa.
There are remarkable ruins of the temple, market, fish salting factory, basilica, and thermal spa; along with an information center with some interesting artifacts.
Entrance fee was 1.50 Euros.
As a bonus it is located right on a wonderful beach with some impressive sand dunes. Naturalists frequent this beach if that is your cup of tea or something you'd rather be forewarned about.