Roman Monuments in Extremadura discusses several important Roman sites in Merida, Spain including bridges, aqueducts, theaters, temples, forums, and reservoirs. Some of the key structures mentioned are the Bridge of Merida built to protect the colony, the Aqueduct of Merida which supplied water, the Roman Theater which could seat 6000 people, and the two public forums in the city. The document provides a brief overview of the significant Roman architectural remains that can still be seen in Merida today.