The famous Alamo, right in the middle of the city (see map), gives a fascinating overview of early Texas history:
Also circling downtown San Antonio is the Riverwalk, a long stretch of restaurants along the San Antonio river. It has been in development since the end of World War 2 and is still expanding. See the map below for the locations of the four photos below. (Because the Riverwalk is surrounded by tall buildings, the GPS was slightly off, but still pretty good. The Motion Picture Browser software however has a nice feature that allows you to adjust the pinpoint to the right spot. The yellow pins are the ones I moved.)
ACTIVE is the leader in online event registrations from 5k running races and marathons to softball leagues and local events. ACTIVE also makes it easy to learn and prepare for all the things you love to do with expert resources, training plans and fitness calculators.