| Houston is the most populous city in the state of | | | | The city of Houston is also home to the Texas |
| Texas, and the 4th most populous in the United | | | | Medical Center (which is the world's largest |
| States over all. As of 2006, Houston had an | | | | concentration of health research and care |
| estimated population of 2,144,491, with more than | | | | institutions), the Port of Houston (which is the |
| 5.5 million people living in the Houston-Sugar | | | | busiest port in the United States in terms of |
| Land-Baytown metropolitan area, the 6th most | | | | international cargo tonnage, and the second |
| populous metropolitan area in the United States. | | | | busiest in terms of over all tonnage), and more |
| Houston is perhaps most famous internationally | | | | Fortune 500 corporations' headquarters than any |
| for being home to NASA's Lyndon B. Johnson | | | | city save for New York. |
| Space Center, which contains the Mission Control | | | | Visitors to Houston will be sure to want to see |
| Center (MCC-H), the NASA control center that | | | | the Houston Museum District (known informally as |
| coordinates and monitors all US manned space | | | | simply "The Museum District"). This area is home |
| missions, including the Space Shuttle and activities | | | | to at least 16 different museums, including the |
| aboard the International Space Station. On display | | | | Byzantine Fresco Chapel Museum (containing the |
| at the Johnson Space Center is a near complete | | | | only intact Byzantine frescoes in the Western |
| Saturn V moon rocket, and an Apollo | | | | hemisphere), the Chldren's Museum of Houston, |
| Command-Service Module (CSM), both of which | | | | the Contemporary Arts Museum, the Houston |
| were originally prepared for Apollo missions which | | | | Museum of Natural Science, and the Holocaust |
| were cancelled. It is because of the presence of | | | | Museum Houston. Also in the Museum District are |
| the Johnson Space Center, as well as the city's | | | | several parks, Houston Zoo (which contains 4,500 |
| other aerospace connections, that Houston gets | | | | animals from over 900 species), and the Miller |
| its nickname: "Space City". | | | | Outdoor Theatre. |