Of course, the top place to see in San Antonio has to be The Alamo.
We had a fantastic time, but as you can see it was raining, so we did not spend much time in the park surrounding The Alamo.
You also have to check out the restaurants in San Antonio! We went to Biga on the Banks, which had the perfect ambience for a romantic dinner. The food was mouthwatering delicious, and the service was AMAZING!!!
A fun place to stop is SeaWorld. There is not as much happening in the winter, but there is still plenty to see and do when you visit, and there isn't a crowd since it is not the prime season to go! We still had a blast!
The RiverWalk Boat tour will give you a great view of the city on the Riverwalk. I recommend walking around as well. In December, the Riverwalk is a beautiful site all lit up!
We also took a trolley tour that took us all around San Antonio. I highly recommend it, as it provided a huge amount of history!
If you have never visited a Texas de Brazil Brazilian Steakhouse, make sure to check it out. They have "wine angels," which are acrobats who do stunts in the wine room (while retrieving wine). A very neat experience!
Things I wish I would have known:
1. It is cold and rainy in San Antonio in December. Bring an umbrella and a winter coat.
2. This is a place to rent a car. The cab service was HORRIBLE.
3. Do not plan your trip during a major sporting event. We were there during a major college game and everything was CRAZY!
4. Bring comfortable shoes. You will be walking a lot.