The Zoo has grown from a small, start-up private operation in Cheatham County to its current status as an Association of Zoos and Aquariums (AZA) accredited member facility with international conservation involvement. The partnership between Metro Davidson Co. and the Nashville Zoo at Grassmere is one in which the land is owned but operated by the Zoo. With 85 acres developed and 102 undeveloped acres, we are one of the largest Zoos in the country by land and has the potential to be a top-rated world-class facility.