 Surrounding Glendalough are the mountains of Camaderry , the hydroelectric station at Turlough Hill , and large massif of Conavalla which dominates the head of the valley, and the peaks of Lugduff , and Mullacor .Glendalough is surrounded by semi-natural oak woodland.Much of this was formerly coppiced (cut to the base at regular intervals) to produce wood, charcoal and bark.