In the Americas With David Yetman

Lake Superior: Circling the Sweet Water Ocean (3x6)

Air date: May 10, 2014

It's the world's largest lake, vast enough to create its own climate. Lake Superior separates the U.S. and Canada, on the east by a portage canal. For a thousand years the lake has seen vibrant cultures and trade in copper. Canadian shores harbor unending forests and some of the coldest towns in the Americas. Within its waters is Isle Royale National Park.