After over two years, more attractions visited, contemplating a couple placements, and remembering a few more I've visited in the past, here is an updated list.
* = Non-U.S. Establishment
Zoo Rankings
1. San Diego Zoo Safari Park (2012)
2. San Diego Zoo (2012)
3. St. Louis Zoo (2013)
4. Denver Zoo (2014)
5. Columbus Zoo & Aquarium (2008)
6. Brookfield Zoo (2010, 2011, 2013)
7. Minnesota Zoo (2015)
8. Memphis Zoo (2016)
9. Busch Gardens Tampa (2008)
10. Disney’s Animal Kingdom (1998, 2004, 2008)
11. Nashville Zoo (2017)
12. Edinburgh Zoo (2017)*
13. Phoenix Zoo (sometime in the 1990’s, 2005, 2010)
14. Rio Grande Zoo (2015)
15. Louisville Zoo (2017)
16. Zoo Knoxville (2013)
17. Buffalo Zoo (2011)
18. Milwaukee County Zoo (all my life)
19. Out of Africa Wildlife Park (sometime in the 1990’s, 2010, 2011)
20. Northeastern Wisconsin Zoo (sometime in the 1990’s, 2016, 2017)
21. Henry Vilas Zoo (2003, 2006, 2007, 2010, 2014, 2015)
22. Racine Zoo (2009 - twice, 2014, 2015 - twice)
23. Peoria Zoo (2017)
24. Gatorland (2014)
25. Miller Park Zoo (2017)
26. Lincoln Park Zoo (Manitowoc) (2016)
27. Alameda Park Zoo (2015)
28. Henson Robinson Zoo (2017)
29. Menominee Park Zoo (2016)
30. DeYoung Family Zoo (2016)
31. Siegfried and Roy’s Secret Garden & Dolphin Habitat (2016)
32. Smithsonian National Zoo (2009)
Aquarium Rankings
1. SeaWorld Orlando (2008)
2. Shedd Aquarium (2002, 2015)
3. Shark Reef Aquarium at Mandalay Bay (2015)
4. Albuquerque Aquarium (2015)
5. Aquarium of Niagara (2011)
These are animal establishments that I have visited, but choose not to rank due to different factors. These include being in a totally different focus (such as Moorpark and conservation centers), not being open to the general public (White Oak), don’t remember them much (Xcaret, The Seas, among others), etc.
· The Seas with Nemo and Friends (2004, 2008)
· Xcaret Wildlife Habitats (2006, 2007)*
· The Wilds (2008)
· Moorpark College: America’s Teaching Zoo (2012)
· Wild Florida Wildlife Habitats (2014)
· White Oak Conservation Center (2014)
· Aquarium Restaurant in Nashville (2016)
Happy 2020 guys! Figured I'd post an updated list, especially after hitting my #40 in late 2019. There's some additional facilities, along with a few adjustments to some original rankings:
* = Non-U.S. Establishment
Zoo Rankings
1. San Diego Zoo Safari Park (2012)
2. San Diego Zoo (2012)
3. Saint Louis Zoo (2013)
4. Columbus Zoo & Aquarium (2008, 2018 - twice)
5. Denver Zoo (2014)
6. North Carolina Zoo (2018)
7. Minnesota Zoo (2015)
8. Fort Worth Zoo (2018)
9. Brookfield Zoo (2010, 2011, 2013, 2018)
10. Memphis Zoo (2016)
11. Busch Gardens Tampa (2008)
12. Disney’s Animal Kingdom (1998, 2004, 2008)
13. Zoo Atlanta (2019)
14. Nashville Zoo (2017)
15. Edinburgh Zoo (2017)*
16. Phoenix Zoo (sometime in the 1990’s, 2005, 2010)
17. Rio Grande Zoo (2015)
18. Louisville Zoo (2017)
19. Zoo Knoxville (2013)
20. Pittsburgh Zoo & PPG Aquarium (2018 - twice)
21. Buffalo Zoo (2011)
22. Milwaukee County Zoo (all my life)
23. Out of Africa Wildlife Park (sometime in the 1990’s, 2010, 2011)
24. Northeastern Wisconsin Zoo (sometime in the 1990’s, 2016 – 2019)
25. Henry Vilas Zoo (2003, 2006, 2007, 2010, 2014, 2015, 2019)
26. Racine Zoo (2009 - twice, 2014, 2015 - twice)
27. Peoria Zoo (2017)
28. Oglebay Good Zoo (2018)
29. Bay Beach Wildlife Sanctuary (sometime in the 1990’s, 2019)
30. Gatorland (2014)
31. Miller Park Zoo (2017, 2018) (TIE)
32. Scovill Zoo (2018) (TIE)
33. Lincoln Park Zoo (Manitowoc) (2016)
34. Alameda Park Zoo (2015)
35. Henson Robinson Zoo (2017)
36. Menominee Park Zoo (2016)
37. DeYoung Family Zoo (2016)
38. Siegfried and Roy’s Secret Garden & Dolphin Habitat (2016)
39. Smithsonian's National Zoo (2009)
40. Special Memories Zoo (2019)
Aquarium Rankings
1. Georgia Aquarium (2019)
2. SeaWorld Orlando (2008)
3. Shedd Aquarium (2002, 2015)
4. Dallas World Aquarium (2018)
5. Shark Reef Aquarium at Mandalay Bay (2015)
6. Albuquerque Aquarium (2015)
7. Aquarium of Niagara (2011)
These are animal facilities that I have visited, but choose not to rank due to different factors. These include being in a totally different focus (such as Moorpark), not being open to the general public (White Oak), don’t remember them much (The Seas, Xcaret, among others), etc.
· Wildwood Wildlife Park & Nature Center (sometime in the 1990’s)
· The Seas with Nemo and Friends (2004, 2008)
· Xcaret Wildlife Habitats (2006, 2007)*
· The Wilds (2008)
· Moorpark College: America’s Teaching Zoo (2012)
· Wild Florida (2014)
· White Oak Conservation Center (2014)
· Aquarium Restaurant in Nashville (2016)
· Safari Lake Geneva (2019)