While in San Antonio, do not miss the Alamo, the Buckhorn Saloon, and the Mission Trail.
The Riverwalk is the main focal point of the city. It offers some wonderful opportunities for riverside dining and shopping. La Villita is the site of the original Spanish settlement. It also offers some great shopping and dining. Some of the smaller towns in the outlying areas are also very interesting.
We were in San Antonio on New Year's Eve and had a blast. The streets around the Hemisfair Park area were all closed off. There were live bands and food vendors in the streets and a fireworks display at midnight. This city really knows how to party!
Quick Tips:
Check the visitor center for discount coupons, etc. It's located near the Alamo.
Best Way To Get Around:
The trolley tours are a very good way to get a general feel for the city. Tickets can be purchased at the visitor center. The Riverwalk, the Alamo, the Buckhorn Saloon, and La Villita are all within walking distance of each other. The Mission Trail can be driven to in your personal vehicle. Many of the bus and trolley tours also stop at the Mission.