Houston, the largest city in Texas, is located in the southeast part of the state near the Gulf of Mexico. The port of Houston ranks high among U.S. ports in foreign tonnage handled. The city is a major business, financial, science, and technology center. Houston is outstanding in oil and natural-gas production and is the energy capital of the world. It is the home of one of the largest medical facilities in the world-the Texas Medical Center-and the focus of the aerospace industry. The Lyndon B. Johnson Space Center is the nation's headquarters for staffed spaceflight. Among the city's many visitor attractions are the Museum of Fine Arts, Space Center Houston, the Houston Arboretum and Nature Center, George Ranch Historical Park, Reliant Park, and nearby San Jacinto Battlefield.