When walls of ice slide off a glacier into Alaska’s Copper River, they can form mini-tsunamis that are 30 feet tall and travel about 300 yards.
Does that sound surfable?
A team of surfers from Hawaii thought so and they were able to catch some icy waves.
Of course, the problem with glacier surfing is that you sometimes have to wait two weeks for a piece of glacier to fall before catching a wave. And the giant wave is filled with razor-sharp pieces of ice, mud and boulders.