Welcome to Arkansas, known as the Natural State. Did you know that many caves run underneath the mountains of Arkansas, some with underground waterfalls? Or that diamonds were first found in Arkansas more than a century ago? Take a colorful journey across the nation with Explore the U.S.A., and learn about the fascinating history, geography, and symbols that make each state special. This series introduces beginning readers to the United States of America through vivid images and engaging text, giving them an exciting look at the places that make up this great country. A unique book code printed on page 2 unlocks multimedia content in these AV2 media enhanced books. Your book comes alive with video, audio, weblinks, slide shows, activities, and much more. Book jacket.