Here are my top 25 zoo exhibits that I've seen:
1.Congo Gorilla Forest- Bronx Zoo
2. Giants of the Savanna/Wilds of Africa- Dallas Zoo
3. Arctic Ring of Life- Detroit Zoo
4. Kiliminjaro Safaris- Animal Kingdom
5. Watani Grasslands- North Carolina Zoo
6. Asia Trail- National Zoo
7. Monkey Trails and Forest Trails- San Diego Zoo
8. Tiger Mountain- Bronx Zoo
9. Polar Frontier- Columbus Zoo
10. Field Exhibits- San Diego Safari Park
11. Range of the Jaguar- Jacksonville Zoo
12. Edge of Africa/ Serengeti Plain- Busch Gardens
13. China- Memphis Zoo
14. Baboon Reserve/African Plains- Bronx Zoo
15. Ituri Forest- San Diego Zoo
16. Museum of Living Art- Fort Worth Zoo
17. American Prairie- North Carolina Zoo
18. Jungle Trail- Cincinnati Zoo
19. Regenstein Center for African Apes- Lincoln Park Zoo
20. Giraffe Overlook- Jacksonville Zoo
21. Asia Quest- Columbus Zoo
22. African Savanna- Nashville Zoo
23. Myombe Reserve- Busch Gardens
24. Wings of Asia- Zoo Miami
25. Lion Camp- San Diego Safari Park
Rankings are subjective but really what is so special about Nashville's exhibit? It's just Elephants and Giraffe's in fairly big pastures. There is very little tree cover. The barns are on the small side as well. But like I said they are visually very boring.