Zilker Park · In the heart of the city, Zilker Park is 15 acres and a favorite for Austinites.  Throughout the year, you can play soccer and sand volleyball, run with your animals, play at the park or ride the Zilker Zepher.  This is the place to celebrate the Austin City Limits music festival, visit the famous Trail of Lights or watch the Austin Kite Festival.  Nestled between Zilker and the Greenbelt you will find the Barton Springs Pool, a natural crystal clear spring where you can swim and relax nearly all year long.  The cost is $3.00, but the time at the pool is priceless.