Austin is absolutely beautiful, but the Zilker Park puts it on a whole new level. The 350-acre park is on every list of must-visit places in the city. It will take you days to explore everything it has to offer – bike trails, Barton Springs for swimming (see the most beautiful places for open-water swimming), a botanical garden, polo, soccer and volleyball fields, the Austin Nature and Science Center, and the UMLAUF Sculpture Garden and Museum. The park is a hotspot for all kinds of concerts and festivals.