The impressive limestone hills of Old Stone near Esztergom are popular not only with tourists, but also with archaeologists, cavemen, geologists, and rock climbers. The cave consists of limestone that dates back to the time of the Triassic period; This is not only one of the most beautiful caves in Transdanubia, but also one of the most important archaeological sites in this region. The passages of Jankovi? Cave were formed by hot water emerging from the depths and melting vaulted holes in the limestone.