The megalithic city of Tarragona, just south of Barcelona in Spain, was the site of a much earlier megalithic culture that built remarkable cyclopian walls before the Romans arrived. The megalithic platforms, believed to have been built by the Iberians, were more likely constructed by an earlier Bronze Age or Neolithic megalithic civilization of the Mediterranean.

The site features impressive cyclopian megalithic blocks that are 15 feet wide, megalithic foundations on the outer walls of the ancient town, and megalithic doorways with giant lentils going into the city. The giant blocks are similar to those found in Latium, Italy, and remind the author of the same style. The walls are probably 40 feet wide and 30 feet wide, and the carvings here could be later Roman carvings utilizing the old blocks. The site also features a section that looks like polygonal stonework and is much later Roman, possibly repurposed. The megalithic city of Tarragona is a serious cyclopian structure that is similar to the Bronze Age or Neolithic sites in Italy and Greece.