The Roman villa studied on the Alamillo beach dates back to the 2nd century. It was made up of two áreas surrounding a main central patio: the terrace, with its baths and heating system, and the industrial part, was dedicated to the production of garum and saltings.
The high empire Alamillo villa is located on both sides of the 332 national highway between Mazarrón port and Cartagena, taking up part of the beach of the same name. The villa was terraced, and separated into two areas around a large central patio: one residential on the north side of the road, with its corresponding baths, and the other service or industrial, and able to be visited today, on the south side. The establishment appears to date to the second half of the 1st century and was abandoned in the 2nd century, perhaps surviving to the early years of the 3rd century.
Eight rooms and part of the baths, originally found, for the most part, under the existing highway, were excavated in the residential zone. However it was possible to study a good part of the caldarium (hot room) and the tepidarium (warm room). The oven (praefurnium) for heating was found outside the west wall of the caldarium, the floor of which supported 12 circular sandstone columns which created an inferior chamber for the circulation of hot air. This air also circulated through the two rows of superimposed vertical pipes which went up inside the dividing wall which separated this room from the tepidarium.
In the service zone a collection of rooms around a patio were preserved, and four small basins for the production of garum and saltings. This small-scale industrial activity related with fishing has to be seen along with the agricultural exploitation of the land which could be irrigated thanks to the proximity of the Alamillo reservoir.