The building of the old railway station in Aridea, known as "train of the Karatzova" was built during the First World War, when the allies of the Entente built in Macedonia narrow lines with width 1,60m. named Decauville (from the name of the French engineer inventor Paul Decauville / 1846-1922), to serve the needs of war. One of these was the line Skydras - Aridea in length 28km, which operated from 1916 until 1936. The Decauville system was used extensively in the 1st World War and widespread use seen during the 50s, especially to meet the transport needs in shipyards, quarries and other industrial units. During the war, base stations which were connected via the Decauville, were Skydra, Aridea, Xifiani, Polykarpi, Apsalo and Orma. From there, the supplies were leaving with trucks to Promachon, Lykostomo, Down Loutraki and then transported by carriage up to the front. The importance of the rail network, appeared in the great battle of Moglenitsa in September 1918 which led to the collapse of the German-Bulgarian front. Due to flexibility and capacity of Decauville in unfavorable geomorphological conditions, the supply speed multiplied. So the planned (from the French General Franchet d'Esperey) surprise attack of the German-Bulgarian troops was feasible.
Today the building of the station has been declared a historical monument, as it is one of the few remaining buildings stations (DECAUVILLE), and one of the few monuments that bear witness to the light of the Greek community in the recent liberation period.
In 2002 the station was converted into a Museum of Natural History and hosts a variety of exhibits from archaeological remains to artworks, inspired by the natural heritage of Almopia. On the ground floor, there is the part of the environment where the visitor can be informed in detail about the rich flora of the mountains of Pella, the paleontology section in which there are exposed important finds from the caverns of Loutraki thermal baths (like bones from the bear cave-precipice, Ursus Speleaus and fossils of plant and animal organisms). Finally upstairs is housed the library of the museum and a folkloric place where exposed traditional costumes of Almopia.
 Papadimitriou, D., '' The train in northern Greece. The development of the railway network by construction of the first line to date”, Seven Days (Daily), October 15, 1995, pp. 8-9.
 Astranidis, G., A small train, a great story, Aridaia, 2013, p. 49.
 Ibid. p. 30-31
 Ibid. p. 46-47.