Above the valley of the Soča, on its left bank near Tolmin, the steep slope of Mt. Mrzli vrh (1359 m) rises. In the First World War, it figured as one of the key points in the Austro-Hungarian defence of the Tolmin bridgehead.
The ridge of Mt. Mrzli vrh is densely crisscrossed by numerous trenches and caves of the two belligerent sides. Just below the top of the mountain, in its north-eastern slope, the Austro-Hungarian Army hollowed roomy caves. In one of them a concrete altar was erected by the Hungarian soldiers in 1917.
The remains of the Austro-Hungarian and Italian first lines of defence on Mt. Mrzli vrh are connected with a circular path which runs past two still active alps, Pretovč and Lapoč.
A beautiful view opens from Mt. Mrzli vrh over the onetime battlefield of the Isonzo Front.
Just below the top of Mt. Mrzli vrh there is a restored monument on the onetime Austro-Hungarian military cemetery.