A Slice Of American History + Texas Sized Thrills
Frank

The San Antonio Riverwalk
This is the perfect spot for breakfast, lunch, and/or dinner. It's filled with cafés, restaurants, bars, and everything in between. There are plenty of things to do, and lots of energy. You can take a boat downy the river, as well - it's like the Texan version of Venice :)
The Alamo
A unique piece of American - and Texan - history, the Alamo is a must-see.
Six Flags Fiesta Texas
If you have kids, this will be the highlight of their trip. There are plenty of high and fast roller coasters for the thrill-seekers.
I would stay at: JW Marriott San Antonio Hill Country Resort & Spa
This hotel feels like a castle with gorgeous views.