Perito Moreno Glacier in El Calafate

One of the few glaciers that is surrounded by Rain Forrest ... Stunning!!!! The glacier is growing and eventually touches land (across the lake) and forms a dam. The ice carries on growing until its over 100m high. Water runs underneath and causes a tunnel to form. When it's about 100m in diameter, the roof collapses (called a rupture). The last rupture happened March 4th 2012 ... You can still see the remnants of the crushed ice tunnel