Natural swimming pool filled entirely by nearby natural springs. The water is (REALLY) cold, but it's worth a dive. Located within Zilker Park. Bring $8 to enter if you're an out-of-towner ($3 if you're a local).
Map | 305 S Congress Ave, 78704 Bat Scoping | Website
Join hundreds of others and huddle on the hill right below Congress Street Bridge to watch a show of a lifetime! Thousands of bats have claimed home underneath the bridge. At dusk each night, they leave their stoops for a feeding frenzy. It's an unbelievable sight.
Hancock Golf Course
Map | 811 E 41st St, 78751 Good Ol' Golfing | Website
"This par 35, 9-hole course carries up and down hills over beautiful Waller Creek. The old course is relatively short by modern standards, featuring small, well-manicured greens typical of the era in which it was built."