Houston is the largest city in Texas and the fourth largest city in the United States. It is a sprawling, cosmopolitan city with a vibrant mixture of ethnicities and nationalities. Houston is situated on the Gulf Coast of Texas and has the fourth largest port in the United States. Some of the world's leading medical and research institutions, including the Texas Medical Center and NASA's Johnson Space Center, are found in the city. Houston is second only to New York in terms of the number of Fortune 500 headquarters. Introduction to Houston - Culture - Location & Orientation - Climate & When to Visit - Sightseeing Highlights - Galleria Mall - Johnson Space Center - Houston Zoo - Museum District - Asia Society Texas Center - Children's Museum - Holocaust Museum - Center for Contemporary Craft - Contemporary Arts Museum - Czech Center Museum - Museum of Fine Arts - Health Museum - Center for Photography - Lawndale Art Center - Museum of Natural Science - John C. Freeman Weather Museum - Kemah Boardwalk - Splashtown - Montrose Neighborhood - Downtown Aquarium - Old Town Spring - Recommendations for the Budget Traveler - Places to Stay - Places to Eat - Places to Shop