The cache is at the crossing of the Great Backa Canal and the side canal the Bajski Canal.
The canals have been restored with EU money. At the north you see one of the old locks. For history see below.
The Great Bačka Canal
https://en.wikipedia.org/wiki/Great_Ba%C4%8Dka_Canal
Great Bačka Canal (Велики бачки канал/Veliki bački kanal) is a canal in Serbia which runs from Bezdan (on the Danube) to Bečej (on the Tisa). The canal is 118 km long and part of the Danube-Tisa-Danube Canal system. The excavation works of Great Bačka Canal began in 1794 and went on until 1801 in Bács-Bodrog County, Kingdom of Hungary. The bed of the canal is 17 m (56 ft) wide and 25 m (82 ft) wide at the top. The average depth is 3 m (9.8 ft). The water of the canal is very polluted because it runs through industrial towns, such as Vrbas, Kula and Crvenka.
History
https://www.ravnoplov.rs/veliki-backi-kanal/
The digging of the Great Bačka Canal was one of the most significant undertakings in the history of Sombor, but also of the whole of Bačka. The canal was particularly important for regulating the water level in the city atar, above all in arable fields, pastures and meadows. By digging it, the number of ponds, swamps, ponds, lakes and rivers that, occasionally or constantly, threatened the land in the area of the city and surrounding settlements was significantly reduced. As a result, the constant threat of malarial infectious diseases, which often decimated the local population and domestic animals decades and centuries ago, was significantly reduced. At the same time, the canal could also irrigate the surrounding area during dry periods. The canal had a special importance for the economy of the city because agricultural products were transported much easier, faster, safer and cheaper than before. Until 1918 the canal was officially named after the Austrian emperor Franz I, with whose approval it was dug. Later, between the two world wars, it was named after King Peter I, and after the Second World War, the official name was Veliki Bački Kanal.
The first idea to dig a canal and connect the Mostonga River near Sombor with the Danube, in order to shorten navigation, came from Sombor senator and mayor Josip Joza Marković, who in 1768 He proposed to the Hungarian court chamber to dig a canal from the bed of the Danube to Mostonga near Sombor. The Mostonga River was then navigable during the summer months, especially in June and July, but from the middle of the 18th century it began to dry up in the summer months. Although he stated all the advantages of this venture, the Chamber administration did not accept Marković's proposal.
What the senator from Sombor did not succeed in, will be achieved a quarter of a century later, on a much larger scale, by the brothers Jožef and Gabriel Kish. The Kish brothers came from a Hungarianized Slovak officer noble family. They attended the Engineering Military Academy in Vienna, after which, during 1768, they were on a study stay in England. Jožef Kiš soon left the army and became an engineer of the Royal Chamber. He worked on the regulation of the Danube near Požun (Bratislava) and Mohács, as well as in the Chamber district of Vienna. At the end of the seventies of the 18th century, as a royal chamber engineer, mathematician and hydraulic engineer, he moved to Bačka and settled in Apatina. He became an employee of the Bačka chamber administration, whose headquarters were in Sombor. At the beginning of the eighties of the 18th century, Kish worked on tasks related to the colonization of the German population (parceling of land and construction of typical settlements). His engineering office was located in Sombor, from where he visited Bačka to maintain waterways and create maps. At the same time, he designed churches, mills, inns, warehouses, roads, bridges, embankments and smaller waterways and drainage canals, and he also made a plan for the new building of the Sombor City Hall, which remained unrealized. Since 1788 he was appointed chief engineer of the Bačka chamber administration.
