Liechtensteinklamm is a gorge with walls up to 300m high, located in the Austrian Alps 50 km south of Salzburg. It is around 4 km long and is named after Johann II of Liechtenstein who had the walkways installed in 1875. The gorge is around 4 km in length of which 1 km is accessible during summer months by means of wooden walkways. It has a depth of up to 300m and in some places is only a few meters wide. At the end of the gorge is a waterfall. It receives around 100,000 visitors a year.