This is one of the most beautiful cliffs in Norway. Situated 1100 feet above the sea level, hovering 700 meters above lake Ringedalsvatnet. The hike starts in Skjeggedal and goes through the high mountains, takes 10-12 hours (23 km in total to Trolltunga and return) and the ascent is about 900 meters. It is a long and hard hike. One can hike there from mid of June till September depending on the situation of snow. Incase you are planning to go there make sure you are in good shape and well equipped.
http://www.mywonderplanet.com/