The Arneson River Theatre is a beautiful, open-air amphitheater nestled on the banks of the San Antonio River. Live music, dance, and other performances are frequently held here. You'll often find music during the day and dance performances in the evening.
During our visit there was an amazing jazz band playing old Latino ballads. The music was spectacular, and it was nice to sit along the banks of the river to soak in the great tunes. It's also a good place to relax if you've been walking for hours, which is easy to do along the San Antonio River Walk.