Atlanta is the capital of and the most populous city in the U.S. state of Georgia, Atlanta is the cultural and economic center of the Atlanta metropolitan area. Encompassing $304 billion, the Atlanta metropolitan area is the eighth-largest economy in the country and 17th-largest in the world. Corporate operations comprise a large portion of the Atlanta’s economy, with the city serving as the regional, national, or global headquarters for many corporations. Atlanta contains the country’s third largest concentration of Fortune 500 companies, and the city is the global headquarters of corporations such as The Coca-Cola Company, The Home Depot, Delta Air Lines, AT&T Mobility, UPS, and Newell-Rubbermaid. In Atlanta, fine dining, shopping and rich history combine with inspiration inducing attractions to create a city with Southern charm and world-class sophistication. It’s easy to see why Atlanta, Georgia is one of the most popular destinations in the Southeast to live and to visit. As of 2010, Atlanta is the seventh-most visited city in the United States, with over 35 million visitors per year. Although the most popular attraction among visitors to Atlanta is the Georgia Aquarium the world’s largest indoor aquarium, Atlanta’s tourism industry mostly driven by the city’s history museums and outdoor attractions. Atlanta contains a notable amount of historical museums and sites, including the Martin Luther King, Jr. National Historic Site, which includes the preserved childhood home of Dr. Martin Luther King, Jr., as well as his final resting place; the Atlanta Cyclorama & Civil War Museum, the National Center for Civil and Human Rights, which explores the American Civil Rights Movement and its connection to contemporary human rights movements throughout the world; the Carter Center and Presidential Library, and the Margaret Mitchell House and Museum. Atlanta also contains various outdoor attractions. The Atlanta Botanical Garden, Kendeda Canopy Walk, a skywalk that allows visitors to tour one of the city’s last remaining urban forests from 40-foot-high (12 m). Zoo Atlanta accommodates over 1,300 animals representing more than 220 species. Besides those festivals showcasing arts and crafts, film, and music, including the Atlanta Dogwood Festival, the Atlanta Film Festival, and Music Midtown, respectively, is also very popular tourist’s attractions.