Great lakes
Yes, the compound noun Great Lakes or The Great Lakes is a proper noun, the name of a specific region, the name of a specific group.
Duluth (in the state of Minnesota) is the name of the westernmost port city on the Great Lakes.
the lakes are great bear lake and great slave lake
the great lakes
Michigan is the states that shares its name with one of the Great Lakes.
Michigan is the states that shares its name with one of the Great Lakes.
As suggested by the name, the Great Lakes are all lakes - bodies of fresh water. Seas are bodies of salt water.
Duluth (in the state of Minnesota) is the name of the westernmost port city of the Great Lakes.
The Great Lakes
The Great Lakes
The Great Lakes.