A Few Great Lakes Light Houses

NOAA's Model of the Grand River entering Lake Michigan

Read more about the Great Lakes in The Dynamic Great Lakes.

Middle Island Sinkhole Lake Huron

Fresh ground water enters Lake Huron through sinkholes near Alpena, MI.  This video is from Google Earth.  Divers and research scientists have been studying this phenomenon since 2008.

Other underwater sites in the Great Lakes may be visited on Google Earth.

Diving Shipwrecks Lake Superior

Lake Superior Frozen

This satellite photo shows Lake Superior on March 3, 2010.  The lake is frozen due to the cold winter. 

According to NOAA, Lake Superior rarely freezes over completely and then just for a few hours.  Complete freezing occurred in 1962, 1979, 2003, 2008, 2009 and this year.

Read more about ice on the Great Lakes in The Dynamic Great Lakes.