Austin, Texas is a pretty damn nice place to visit... although, I'm actually not that familiar with its attractions, as I was a bit of a shut-in when I lived here full-time. However, I do know some stuff.
If you're here during the summer, you gotta drop by Town Lake under the Congress Street Bridge around dusk. It's all boring and quiet, then suddenly...
Bats. Over a million of them.
For extra fun, show up in a Batman costume.
And of course, there's downtown, where all the restaurants, bars, and live music venues are. That last one is kind of our "thing"; Austin is the self-proclaimed "Live Music Capital of the World". I don't know about all that, but I'll admit that live performers aren't hard to find.
Also, you have to eat at Chuy's. And Torchy's "Damn Good" Tacos. And Snow Beach. And... You know what? Just Google Austin restaurants. You'll come up with tons of stuff.