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The great lake state that has more shoreline than the entire US Atlantic Seaboard is Michigan.
Appalachian Mountains
The Eastern seaboard where the 13 colonies were located.
Michigan
The Mississippi catchment area, the Great Plains, the Rocky Mountains. the Pacific Ocean...
Australia's highest mountain is Mt Kosciuszko, with an elevation of 2228m. It is located in the Snowy Mountains, a range within the massive Great Dividing Range that extends down the entire eastern seaboard of Australia.
Australia's eastern and southeastern seaboard is characterised by the highest mountains in Australia. The Great Dividing Range extends from the eastern coast of far north Queensland right down the eastern seaboard to Victoria in the south, before turning west into Western Victoria. The greatest concentration of high mountains is found in southeastern New South Wales and eastern Victoria. Tasmania is also a rugged and mountainous state.
The main mountain range in Queensland is the Great Dividing Ridge, which runs North to South-East from just above the Eastern Australian city of Cairns down as far as Brisbane. Other than that, Queensland is a flat Australian state.
If you are talking about shoreline, none of them. All five Great Lakes have at least some American shoreline.
Michigan has 3288 miles of shoreline (Great Lake Shoreline), most of any state other than Alaska.
No, Captain Cook never explored beyond the eastern seaboard and the seaward side of the Great Dividing Range. He was a sea explorer, not an overland explorer. He had no idea of what actually lay inland beyond the Great Dividing Range.
In the Napoleontic wars: Russia and Spain. In the war between the US, Canada and Britain: mostly the states directly south of the great lakes.The war was mainly fought in the Atlantic Ocean and the eastern seaboard, around the Great Lakes, and in the American South.