The geophysical truth about the ‘Gold Train’ in Walbrzych, Poland

The paper presents the results of geophysical research conducted in the region where the so called ‘Gold Train’ was believed to be located. The surveyed site was located in Wałbrzych, at the 65th kilometre of the railway connecting Wrocław and Wałbrzych. The aim of the research was to verify the legend of the existence of the so called ‘Gold Train’ that was supposed to be located in the tunnel. The ‘Gold Train’ was believed to contain Wrocław's treasures. Three geophysical methods were used. Microgravimetric and GPR (ground‐penetrating radar) methods were applied to locate the void (tunnel), while the search for the train (a metal object) was conducted with the use of a magnetic method. Detailed geodetic measurements were used, including, among others, laser scanning. Due to complex terrain and geological structure, the negative results of the microgravimetric research was conclusive only in respect of one of the profiles. Due to high attenuation of electromagnetic wave by a shallow geological structure the scope of the GPR method was limited, however it was sufficient to confirm that such a tunnel does not exist. Despite difficulties related to electric lines in the researched area, conclusive results were obtained using the magnetic method. No magnetic anomaly with a shape or amplitude indicative of a steel train was identified.