Mérida has some of the most impressive Roman ruins in Iberia. Founded by the Romans in 25 BC on the banks of the Río Guadiana, the city is strategically located at the junction of major Roman roads from León to Seville and Toledo to Lisbon.
Other Roman sites nearby require a drive. Across the train tracks in a modern neighborhood is the circo (circus), where chariot races were held. Little remains of the grandstands, which seated 30,000, but the outline of the circus is clearly visible and impressive for its size. Of the existing aqueduct remains, the most impressive is the Acueducto de los Milagros (Aqueduct of Miracles), north of the train station.