Barton Springs Pool

Inside Zilker Park's 358 acres lies one of the crown jewels of Austin - Barton Springs Pool.

The pool itself measures three acres in size, and is fed from underground springs with an average temperature of 68-70 degrees, ideal for year-round swimming.

Over the years, Barton Springs Pool has drawn people from all walks of life, from legislators who have concocted state laws there to free-spirited, topless sunbathers who turned heads in the 1970s.

Robert Redford learned to swim at the pool when