David's favorite spot for juice and smoothies in Austin- he recommends "All of them".
Take a dip in the local natural COLD spring water. Bring a towel and sunscreen, but no food or drinks aside from water bottles.
Tacos- a must.
Coffee with patio views of Lake Austin.
Lovely walking trail downtown- aim for the early morning or evening to beat the heat.
Coffee booth next to many shopping spots.