The north of Hungary hides natural phenomenon that has even reached the UNESCO list. Aggtelek National Park is a system of 280 caves of various sizes. The biggest attraction of the national park is Baradla Cave. The complete system of chambers is more than 25 kilometers long, and one part of the cave is on the territory of Slovakia, where it's called Domica. The cave decorations are spectacular, of various colors and shapes. According to that criterion, this cave is one of the most beautiful in Europe.