For 4th of July weekend this year I took a road trip to San Antonio and Austin. The weather was incredible and I had a lot of fun driving through the Texan farmland. I went to San Antonio first and visited the Alamo and other missions, all of which encompass a UNESCO world heritage site. The architecture is incredible and entrance is free to all the sites.
In addition to the Missions, San Antonio has amazing Mexican food and crafts centers. It was definitely worth the detour on my way to Austin to spend an afternoon there.