Monte Kaolino is similar to a ski resort, but instead ... There is a lift that takes you up to the top of a tall sand dune and you can ride down on a board or on sand skis. There are 35,000,000 ...

The slopes left behind by the glaciers turned into dunes as a result of Lake Michigan's tide pushing sand up onto the shore ... cross-country skiing, sledding and more. Recent visitors found ...

This story appears in the November 2012 issue of National Geographic magazine. I got my first lesson in the physics of sand dunes in 1998 on an expedition into the Sahara. In order to take aerial ...