Nashville Zoo has been among the MOST successful fund raisers for new exhibits of any zoo. Do not confuse these funds with what was lost at the gate over the past 18 months. This has been in the works for a very long time.
Nashville Zoo has grown in leaps and bounds over the years. I visited once (2010), but since then the facility has added Flamingo Lagoon (late 2010), the Wilderness Express miniature train (2011), Kangaroo Kickabout (2013), Cassowarries (2014), a brand-new Entry Village and zip line (2016), Spider Monkey: Treetop Passage (2017), Expedition Peru: Trek of the Andean Bear (2018) and Tiger Crossroads and a Veterinary Center (2019). Wow!
Even with all the additions, the zoo's website states that "we recommend setting aside between 2 and 3 hours for your visit". With young children, I think that the Jungle Gym playground alone is a 2-3 hour visit!