Circo Romano de Mérida Monument · Mérida, Tierra de Mérida - Vegas Bajas, Badajoz Built in the early 1st century (possibly under Tiberius), it is more than 400 m long and 100 m wide, with an estimated capacity of 30,000 spectators; its central spina measures 223 m long by 8.5 m wide. It is one of the best-preserved Roman circuses in Hispania. Photo: Lansbricae (CC BY-SA 2.0) What to see and do in Mérida