In archaeological geophysics, ground-penetrating radar (GPR) has developed into one of the standard methods over the past decades. In particular, the method is the preferred choice for the detection of stone structures and air-filled cavities. The project from Memmingen (Bavaria, Germany) presented here starts by addressing the investigation of a former Baroque garden for any remaining subsurface remnants such as paths, flowerbed borders and fountain installations. Based on the results, it is hoped that the former appearance can be rendered visible again. In addition, a presumed cellar structure was documented underneath the preserved garden pavilion, the exact extent and shape of which were previously unknown. A brick barrel vault was identified below the entire pavilion. From a geophysical perspective, the results from the latter area also show that, even for small grids, medium-frequency antennas are often preferable despite their lower resolution, as the penetration depth of high-frequency antennas is often too shallow. To create a 2.5D overview on the pavilion layout, the GPR data is additionally combined with a Structure-from-Motion (SfM) documentation of the pavilion’s outer walls.