Fountain (IMAGE) Penn State Caption This is a depiction of Piedras Bolas aqueduct functioning as a fountain. This illustrates one plausible explanation of how the feature used water pressure. Due to destruction of the aqueduct, exact details of the its use are unknown. Note that during the monsoon, excess runoff flows over the freature while the buried conduit continues to function. Credit Reid Fellenbaum Usage Restrictions Non commercial use only License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.