The gorge on the Tolminka River is the lowest point (180 m) in Triglav National Park and the longest gorge in Slovenia. It is also among the deepest. The junction of the gorges of the Tolminka and Zadlaščica rivers with their gorges is a unique phenomenon in Slovenia. The chute of the Tolminka River is about two hundred meters long and five to ten meters wide. The spring of thermal water (18.8°-20.8°C) on the bank of the Tolminka just below the end of the trail through the gorge is another great rarity in the alpine world (the temperature of Tolminka river is betwen 5°-9°C). The well known Hudičev most ("Devil's Bridge") over which the Tolmin-Čadrg road passes arches sixty meters above the Tolminka, and above it is the entrance to the Zadlaška or Dante Cave.