Alaska is the largest state by area, encompassing a massive 663 million square miles. Seventeen of the tallest mountains in the U.S. are found in Alaska, including the highest peak in North America, Mount McKinley. The mountain rises 20,320 feet above sea level. The Yukon River is the third-longest river in the country.
Alaska is surrounded by an estimated 100,000 glaciers and around 70 potentially active volcanoes. It is also the state with the highest frequency of earthquakes.Learn more about United States