If your summer travels take you anywhere near Austin or San Antonio, don't miss beautiful San Marcos, one of the crown jewels of the Hill Country. Only 2 1/2 hours from Houston, this bustling little riverside town is located at the headwaters of the crystal-clear San Marcos River, surrounded by scenery that is among the best in the state. San Marcos is home to nature theme parks, world-class shopping at two enormous designer factory outlets, whitewater sports, Texas State University, picturesque historic districts, merry festivals, great antiquing, wineries, theater, and food. And of course, it is home to the Dillon family's ...