The heart of Houston, the fourth-most populous city in the United States, is a diverse and growing urban center for entrepreneurs in retail, industry, and entertainment. Many industries, such as shipping, space and aeronautical, medical research, and, of course, oil and gasoline, prospered here. Since the mid-1990s, the city has worked to revitalize its downtown into a pedestrian-friendly area catering to various tastes. This tour will guide you to many of the downtown area’s most popular attractions.