This paper is devoted to investigations of heterogeneities in the geological medium with GPR. The main principles of GPR surveying settings for VIY3-300 (300 MHz antenna) GPR are mentioned in that paper. Results of investigations are represented by radarograms with matches of observed objects on four sites of investigations: 1. Experimental polygon. 2. Granite quarry. 3. Exposure of granite and their coverage by sedimentary rocks. 4. Evaluation of the depth to the borders between layers of soil and building materials. According to the results, it is possible to detect fissures, metal and plastic pipes, border between layers with different permittivity VIY3-300 (300 MHz antenna) GPR .