The Himalayas are, in geological terms, young mountains formed by the Indian subcontinent pushing north against the Tibetan plateau. Powerful forces have sculpted this landscape as rivers flowing from Tibet eroded the deepest gorges in the world as the Himalayas were slowly pushed upwards. The landscape is constantly changing with frequent landslides and erosion. Earthquakes and numerous hot springs are a reminder that this is a volatile geological region. Broad almost dry valleys in the high mountains are full with water at times of snow melt. Ice sheets and glaciers have fashioned enormous 1500 metre high rockfaces like Paunga Danda. In the rain shadow desert in the higher Marsyangdi and Kali Gandaki wind is the most powerful erosive force. At well over 3,000 metres fossil evidence can be found of the time this area was the floor of the Tethys Ocean. During our treks peaks up to over 8,400 metres soon became a commonplace - Langtang Lirung, the 5 Annapurnas, Nilgiri and Dhaulagiri all towered above us and seemed so close in the clear mountain air. Sunrises became a daily delight, particularly from Poon Hill. To see the photos click here.