Moosehead Lake from a visitors seaplane ride looks like the head of a Moose. Can you see it? This picture was taken last week as a guest took a ride with Jack’s Air Service, right here in Greenville, Maine. The lake is 20 miles by 40 miles and is the largest instate lake east of the Mississippi River. Taking a seaplane ride is one of two very popular activities for vacationers. The other activity is of course a Moose Safari. Moose can also be spotted from the air, with a keen eye.