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Icebreaker, Lake Superior

Picture: Icebreaker, Lake Superior

An icebreaker carves a path through Lake Superior's Thunder Bay, in Ontario, Canada.

The Thunder Bay area is home to more than a hundred shipwrecks and a rich shipping history. The 448-square-mile (1,160-square-kilometer) sanctuary was designated as federally protected because of its cultural resources.

Photograph by Medford Taylor

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Photo: Montana

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For Kids! Creature Features

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Click to learn more about animals and their habitats.

Lesson Plan: Using Ocean Maps

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Find a variety of geography lesson plans and activities for all age groups.