I believe the Zion Canyon Visitor Center is a good example of the precedent that should be set for this project. Wouldn’t a cooltower be.. well.. cool??
This PDF is a nice visual representation of the make up of the center: http://www.nrel.gov/docs/fy00osti/29315.pdf
More facts about the center: https://www.nps.gov/zion/learn/nature/zion-canyon-visitor-center.htm