Data synergy consists of acquiring and combining data from different sensors to achieve better problem analysis and research results. For more comprehensive data analysis, the sensors are not only mounted on one platform but should also be compatible in terms of software and hardware, e.g. for the same timestamp registration by different sensors. This article presents the idea of synergy between the ground penetrating radar (GPR) and photogrammetric data for damage detection in a pavement in park alley. The data were acquired with a platform equipped with a GPR, LiDAR (Light Detection and Ranging) sensor and three RGB cameras. The data were collected in the Pole Mokotowskie Park in Warsaw, Poland. Three drives were made along the same path with the platform, so it was possible to assess the repeatability of the data. Based on the GPR data, orthophotomap and digital terrain model (DTM) from images, cracks in the pavement were analysed. The article has shown that the synergy of data collected for the alley, which shows the situation above and below the ground level, enables for more detailed and comprehensive analysis.