We reach the end of our adventure at the awesome Great Smoky Mountains. A subrange of the Appalachian Mountains, the Smokies stretch for 54 miles along the Tennessee-North Carolina border.

Rising 6,643 feet, the highest peak is Kuwahi (or Clingmans Dome). It offers an observation tower, perfect for taking in the majestic scenery of Great Smoky Mountains National Park – the country’s most visited national park.

Now check out our ranking of the world's most beautiful natural wonders

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America's most spectacular mountain peaks, ranked