Albuquerque, Denver, Phoenix, or Salt Lake City

1. ... is the most populous of the four, both in terms of city proper and urban agglomeration.

2. ... is known as "The Mile High City."

3. ... is located in the Valley of the Sun.

4. ... is NOT a state capital.

5. ... is the only one of the four where you will encounter saguaro cacti growing in the wild.

6. ... has hosted the Olympics.

7. ... is located in the Great Basin.

8. ... is where the television show "Breaking Bad" is set.

9. ... is where the Church of Jesus Christ of Latter-Day Saints is headquartered.

10. ... hosts a large hot air balloon festival every October.

11. ... has the busiest airport of the four in terms of passenger traffic.

12. ... lies immediately to the west of the Wasatch Range.

13. ... is known as "The Duke City."

14. ... is home to a team in each of the four major North American professional sports leagues (MLB, NBA, NFL, and NHL).

15. ... is located on the Great Plains.

16. ... lies on the Rio Grande.

17. ... has the tallest building of the four.

18. ... has the most populous suburb of the four.

19. ... has the least average annual sunshine of the four.

20. ... has the most average annual sunshine of the four.