Off the top of my head, these are the schools I have visited: Ohio State, Ohio U, Miami U, Cincy, Dayton, Otterbein, Denison, Capital, Case Western Reserve U, Michigan State, Michigan, Butler, Purdue, Depaul, U of Chicago, Northwestern, Harvard, Cornell, Georgetown, Roger Mason, UVA, William & Mary, Christopher Newport, Hampton, Old Dominion, Auburn, Arizona State and U of Washington. I love many parts of Ohio State's campus, and think that the south oval in the spring is the most beautiful part of campus and compares favorably with any school in the country. Having said that, this is my top three:
3. Miami University - the college in Oxford is everything a campus should look like. Beautiful academic buildings that match well together with aged trees and lots of green spaces. I like to think of it as a poor man's...
2. University of Virginia - from the academic lawn to main campus to the little pocket of heaven called north grounds where the business and law schools are, this is where the American south meets the Italian and Parisian architectural styles that Jefferson brought back as an ambassador in the early days of the union. Scott Stadium incorporates some of that architecture, with the football stadium sitting partly below ground and partly above, with open air Roman-style columns above one end zone. It doesn't hurt that the surroundings of Charlottesville and Albemarle County are beautiful in their own right.
1. Cornell University - I visited Ithaca in July and I have never seen a more beautiful place, let alone campus. The campus sits up on a hill overlooking the finger lakes, gorges, and town below. Most of the campus buildings, chapel and dorms are built out of stone from nearby quarries. I would have attended grad school there in a heartbeat if not for that gloomy 9-month winter they have. Here are some pictures of (1) the campus at sunset, (2) the outside of the law school, and (3) the inside of the law library (the picture doesn't even do the library justice):