Nashville Zoo at Grassmere has all the usual animals and some endangered critters like the red-ruffed lemur and a cotton-top tamarin. Their "Unseen New World" is a fascinating look at mainly reptiles of Columbus's New World. What makes this zoo unusual is that part of the attractions you visit here include the Grassmere Historic Home, Davidson County's second oldest residence that is open to the public. There are also outbuildings to help understand the Grassmere lifestyle.
If you go:
March 11, 2022 to October 10, 2022 open 9am to 6pm October 11, 2022 to March 9, 2023 open 9am - 4pm
Links:

3777 Nolensville Pike
Nashville, Tennessee 37211 USA
Phone Numbers:
zoo
+1 (615) 833-1534
+1 (615) 833-1534