Houston is internationally known for its energy—particularly oil—and aeronautics industries, and for its ship channel. The [[Port of Houston]] ranks first in the country in international cargo and second in total cargo tonnage. Second only to New York City in Fortune 500 headquarters, Houston is the seat of the [[Texas Medical Center]], which contains the world's largest concentration of research and healthcare institutions. | Houston is internationally known for its energy—particularly oil—and aeronautics industries, and for its ship channel. The [[Port of Houston]] ranks first in the country in international cargo and second in total cargo tonnage. Second only to New York City in Fortune 500 headquarters, Houston is the seat of the [[Texas Medical Center]], which contains the world's largest concentration of research and healthcare institutions. |