US Air Force Academy for view of Pike’s Peak, and the Chapel shaped like a rocket !
U of Colorado Boulder, Lyons sandstone buildings, and Flatirons view,
Rollins College, I love the Spanish architecture, chapel and Lake Virginia.
Cornell–the view of Lake Cayuga from the Art Museum , and the clock tower and other iconic buildings, as well as
the gardens and gorges
Princeton
UVA (in Spring)
William & Mary (in Spring)
Rollins
Dartmouth
Oberlin
Bowdoin (in the Fall)
“US Air Force Academy for view of Pike’s Peak”
I think it is even better from Colorado College. 
I thought Princeton was gorgeous until we visited Cambridge University in England. The view of the colleges from the “Backs” is stunning. Spent an afternoon having wine and cheese along the river. It was incredible.
Hamilton
Kenyon
Mount Holyoke
High Point in a weirdly artificial way.
Miami of Ohio is spectacular, particularly in the Fall.
William and Mary, Hamilton, Washington University in St. Louis. William and Mary and Dartmouth are pretty spectacularly integrated with beautiful little towns. I love University of Washington (Seattle) as a great campus in a great urban area (not an “urban campus”) and was lucky to visit right at the peak of the cherry blossoms in bloom. Lewis and Clark and Sewanee are two of my favorite settings.
U South Carolina is beautiful with the light brick buildings.
@exlibris97 I agree with your view of Cambridge. The central colleges on the river are tough to beat. I can think of U.S. colleges with better macro scenery (e.g. mountains and oceans), but not ones that have produce more beauty from the development of the campus itself. Cambridge and Oxford also have gardens and architecture in combination that have been refined and perfected over centuries. U.S. campuses typically feel more pro forma in comparison. Due to heat and humidity, most U.S. campuses use more shade trees, which can restrict views.
I think Yale perhaps comes closest to Oxbridge in architecture, although I would give a nod to the overall charm of Princeton. Harvard, despite its age and location on a river, feels like it has never quite come together architecturally.
University of Miami (FL) with the huge, beautiful banyan trees all around campus. Pool right in the middle too. Feels like you’re going to school in a resort. They setup hammocks for the kids to study in at finals time.
@Coloradomama My daughter’s dorm room had a view of Pike’s Peak last year. This was Colorado College.
Dartmouth
Dickinson
Hamilton
Trinity (CT) as long as you don’t leave campus
Vassar
Georgia Southern had beautiful grounds in the spring.
There is a new ranking from Architecture Digest with Yale at the top. https://www.architecturaldigest.com/gallery/most-beautiful-colleges-in-america
I would probably agree from an overall architecture standpoint, but the environs would drag it down a bit.
My S19 would disagree but I thought Princeton was gorgeous. He thought it was overwhelming & depressing and immediately took it off his list. Sigh
For context most of our visits took place during the summer or very early fall due to athletics
These top 4 are all very very close. S had a tough time ranking them b/c he liked them all so much. We also liked Franklin & Marshall though the campus is very tiny. Rice is also beautiful if you don’t mind living in a sauna. Gettysburg is pretty, but a bit bland.
Schools that got a @&%, No! from our son.
Georgetown, GWU, Emory, U Chicago. He has also been to Miss State, Auburn, and Tulane for his sport. He didn’t even consider them afterwards.
First, all college campuses I made detailed visits to during my life time:
UCLA, Berkeley, UCI, UCSB, UCSC, UCSD, UC Davis, Stanford, Pomona/Claremont, GW, Georgetown, Auburn, Emory, Harvard, Cornell, William Mary, Miami Oxford, Temple, UPenn, UVA, George Mason, Columbia, NYU, Georgia Tech, MIT, Smith, some Cal State colleges, Boston U, Alabama, RPI, CalTech,
Of these, Stanford, UCLA and Cornell stand out from the rest. Ugliest were: RPI and UCSD.
Berry College in Georgia, beautiful castle surrounded by forests and mountains and streams.
Can’t believe only 6 people mentioned Rice!
My ranking: