As an archaeologist I must say this place is a dream. The largest Roman settlement in Portugal is definititly worth a visit. I would recommend to visit the museum first, it gives a really clear picture of urban life in roman times. They also have some really nice artefacts there that they excavated there. The ruins are really impressive. But you can't walk just everywhere, they protect the weaker spots like the many beautiful mosiacs. Still you can see everything. There is a leaflet in different languages you can get at the entrance take it with you because even though the leaflet doesn't really have any extra information in it, it has a good map of the ruins. This way you'll always know what you're staring at. The big defensive wall destroyed a few houses and cuts right through the site but with some of the houses it is still very easy to recognize the different parts. The forum is a bit bare though. Excavations are still ongoing and you might see some students from the nearby university of Coimbra or international students trowel away on your visit.

Awesome roman archeological site.