Glacier Bay Calving
There is really no way to effectively capture the power of a glacier calving (the process by which older ice is pushed out of the way by new ice behind it). The distance from the water line to the top of this frame shot in Glacier Bay National Park is about 200 feet - a twenty-story building. The cloud of dirt - from the previously exposed ice - is about 40 feet tall. The sound it makes is not unlike that of a subway train roaring through a station. You can see the shiny blue ice that has now been exposed at the top.