Where to find caves if you love to visit them? The Rajko’s cave is located in east Serbia, near Majdanpek, and Bor about 190km from Niš. It is one of the longest caves in the country. It has Rajko river runs throughout it. The cave itself can be divided in two parts, lower river horizon and the upper dry one. Through cave tourists can see connected halls, canals and corridors, and impressive cave formations of stalactites, stalagmites, columns of snow white crystal calcite.