Impressive Roman ruins straddle both sides of the Tripolis road. The star attraction is the half-crumbled theatre , which originally seated 20,000 people. Dating from Classical times, it was greatly modified by the Romans. Nearby are the remains of a 1st-century-AD odeion (a smaller theatre) and Roman baths . Opposite is the Ancient Agora . Signs provide diagrams and contextualise the setting. From central Argos, head south along Danaou for about 500m and then turn right onto Theatrou.