Right in the middle of town is a very impressive forum area. The forum itself has a remarkable number of pillars still standing as well as a statue of an emperor I am assuming. On the shore side you can walk along the decumanus and there are a lot of informational boards explaining what is what. On the other side of the forum which can be viewed after the theatre there are four separate temples I believe with the details all very well described. There are also great views of the forum from this side with the ocean in the background.