五大湖の偉大さとは？：チェリー・ドブスとジェニファー・ガブリス

五大湖を知っていると思いますか?あまり知られていない事実をいくつかご紹介します

Are There Sharks in America’s Great Lakes?

The Mysteries Of North America's Great Lakes | Naked Science | Spark

Great Lakes Facts

五大湖の地理/北アメリカの五大湖

Great Lakes 101 - How Big Are The Great Lakes Actually?

Drain The Great Lakes of America | Secrets of the Freshwater Oceans

Restoring Great Lakes Fisheries

The hidden danger in the Great Lakes

5 Great Lakes Shipwrecks

You know 5 Great Lakes.. but in Reality there are 9

North America's Forgotten Great Lakes

Ghost Ships of the Great Lakes: Lost Beneath the Waves (Full Episode) | National Geographic

Do you know What are The 5 Great Lakes?

How did the 5 Great Lakes get their names?

Did you know about the 5 Great Lakes of Canada

There Are Only 4 Great Lakes - Michigazetteer

5 Ships that Mysteriously Vanished on the Great Lakes

CROSSING ALL 5 GREAT LAKES! | Documentary Life (ep. 008)