Southern Spain is a seismically active area due to the boundary between the Eurasian and African plates. The Roman Ruins of Baelo Claudia at the Strait of Gibraltar host an archaeological record of at least two destructive earthquakes in Roman times. Furthermore, there is geological evidence for severe tsunami impact along the coast. We conducted an extensive georadar survey within the ruins in order to map geological evidence for ground shaking and to trace earthquake damage horizons. The data also have the potential to reveal tsunami layers within the archaeological site. In 2006, we used GSSI 300 MHz and low-frequency 240 cm antennas with a GSSI SIR-2 field computer to collect several kilometres of georadar data. The data also reveal hidden archaeological objects such as ancient roads and walls. This dataset contains three folders: - ascii: rawdata in *.dzt format - rawdata: data imported to ReflexW format, trace interpolation based on 1 m-spaced markers - images: jpg files of the processed data We also include: - a ReadMe file - a map with the location of the profiles - an ExcelSheet with details on every georadar profile