The region is situated between the High Tatras and the Dunajec River in the north, the springs of the Váh River in the west, the Slovenské rudohorie Mountains (Slovak Ore Mountains) and Hnilec River in the south, and a line running from the town of Stará Ľubovňa, via the Branisko mountain (under which lies the 4,822 m long Branisko Tunnel, currently the longest in Slovakia), to the town of Margecany in the east. The core of the Spiš region is formed by the basins of the rivers Hornád and Poprad, and the High Tatra Mountains. Throughout its history, the territory has been characterized by a large percentage of forests - in the late 19th century, as much as 42.2% of Spiš was forest.