Wind has been a source of energy used by mankind for centuries. In fact, one of the oldest ways to get around is sailing. Before the modern network of roads and railways sprawled out all over the globe the easiest and quickest way to move people and cargo from one place to another was by water, and sailboats were the primary vehicle of choice before steam power took over. Open seas and oceans were ideal since they provided lots of room to maneuver and didn't have any obstacles to slow the air, buy skilled sailors were able to navigate various channels and rivers as well. Wind powered vehicles do not, however, have to be confined to water.
