There are several of these stone cisterns at the center, all part of the rainwater collection system. They collect over 300,000 gallons of rainwater a year for the center’s landscape watering needs. They are beautiful stone structures, in the architectural style we call “Hill Country architecture”. Austin is in Texas’ Hill Country, 3 hours south of my home.
Beautifully made and will last several lifetimes! Keep the water cool too!