 The northern section from Loop 1604 to downtown serves one of the fastest growing areas of the city.A majority of the region's suburban office space is located along the corridor as are the headquarters for USAA, gasoline refiner and retailer Valero, South Texas Medical Center, the University of Texas at San Antonio (UTSA), Six Flags Fiesta Texas, and the Shops at La Cantera.I-10 intersects I-410 for the first time near Balcones Heights, a suburban city within San Antonio.