Höllental

Northwest of Gloggnitz, beyond Hirschwang, stretches the wildly romantic gorge known as the Höllental ("Hell Valley"), which the River Schwarza has cut through the limestone rock between the Raxalpe (2,007m/6,585ft) to the south and the Schneeberg (2,075m/6,808ft) to the north. For some 12km/7.5mi the rocks are often so close together that there is barely room for the road. Parallel with the road runs a pipe carrying water to Vienna.