Zilker Park is a place for polo, for soccer, for volleyball, for festivals and theater. Barton Springs Pool is fed by the natural Barton Springs and is happily swum in year round. Hiking and biking trails thread within the park's rocks and trees. And there are enough events here to fill the year, from the intense and crowded Austin City Limits Music Festival to the windy-mellow Zilker Park Kite Festival.