I travel all over for business, and always check out the sporting facilities (especially baseball stadiums) when I get a chance to get on the local campuses.
Some of the top ones that stand out, in no particular order:
1. LSU (pretty awesome)
2. Arizona (renovated spring training facility off campus)
3. Louisville (just saw this one two days ago, impressive campus).
4. Cal State Fullerton
5. Ohio State (OSU colored turf sponsored by Nic Swisher, pretty cool).
6. Notre Dame (probably one of the prettiest campuses overall, I have seen)
7. Michigan (nice)
8. Omaha Home of CWS (Creighton gets to play their home games here).
9. Georgia (just okay)
10. Kent State (not great, but putting some money into baseball, so getting better).
11. Pitt
12. North Carolina (one of my favorites)
13. Duke (not great, but not bad)
14. Iowa (just okay)
15. Virginia (really nice!)
16. Va Tech (nice)
17. Hawaii (disappointed with the whole campus. Baseball stadium not too bad)
Probably a few more that I have forgotten. This is one of my favorite things to do, while traveling on business. Will be checking out Penn State's campus next week. I think they are either building, or already upgraded their baseball stadium/facilities.