A staple of Austin, Barton Springs is a natural spring pool in the heart of the city. If you want to cool off from the TX heat this is the place for you.
Art museum on UT-Austin campus - the Brazos parking garage is the closest parking option. Park and explore UT's campus and pop in to see some cool art and escape the TX heat.
The staple of any class field trip in the Austin-area :) bring the kids and see some cool rocks!
If you want to experience some Texas BBQ - Terry Black's is the spot for you. Close to Barton Springs Pool and broader Zilker Park in Austin. Fair warning - it is usually packed with limited parking option so Ubering is encouraged.
An Austin original, Juiceland is a great place for a smoothie and/or juice after a night out. They specialize in vegan/plant based options and there are plenty of locations both in Austin and the surrounding area.
Another Austin native this time in taco form. Papas egg and cheese with dona salsa is a great way to start any morning. Several locations in Austin.