Gopher games (several multiples at certain away venues):
Minnesota - Memorial Stadium
Minnesota - Metrodome
Minnesota - TCF Bank Stadium
Illinois
Indiana
Iowa
Michigan
Michigan State
Ohio State
Nebraska
Northwestern
Penn State
Rutgers
Purdue
Wisconsin
(Missing only Maryland for B1G venues, therefore; was going this year, but COVID prevented it).
Toledo
Colorado State
(I might be leaving some non-conference roadies out?)
Sun Bowl
Miami Dolphins Stadium
Tennessee Titans Stadium
Sun Devil Stadium
Non-Gopher games/venues:
Rose Bowl, Pasadena, CA - UCLA/Stanford
Tiger Stadium, Baton Rouge, LA - LSU/Florida (night game)
Lincoln Financial Field, Philadelphia, PA - Army/Navy,
Vaught-Hemingway Stadium (and The Grove!), Oxford, MS - Ole Miss/Georgia
Everbank Field, Jacksonville, FL - Georgia/Florida
Husky Stadium (and sailgating!), Seattle, WA - Washington/Oregon
Texas Memorial Stadium, Austin, TX - Texas/Baylor
Memorial Stadium, Clemson, SC - Clemson/Georgia Tech
Memorial Stadium, Berkeley, CA - Cal/Stanford (aka The Big Game)
Michie Stadium, West Point, NY - Army/Temple
Kyle Field, College Station, TX - Texas A&M/Clemson
Sanford Stadium, Athens, GA - Georgia/Notre Dame
I may be forgetting some, too.
A lot of small (non FBS, MIAC, D-2, -3, etc.) colleges, too many to list.
(Some) on my "yet to see" list:
Autzen Stadium, Eugene, OR
Reser Stadium, Corvallis, OR
Notre Dame Stadium, South Bend, IN
The Swamp, Gainesville, FL
Doak Campbell Stadium, Tallahassee, FL
Oklahoma Memorial Stadium, Norman, OK (scheduled for 2021!)
The Coliseum, Los Angeles, CA
Bryant-Denny Stadium, Tuscaloosa, AL
Navy-Marine Corps Memorial Stadium, Annapolis, MD
More, but I'll stop there.
Lastly, and as important as anything . . . . I believe my list gives me some credibility and license to opine . . .
TCF Bank Stadium, is an awesome, awesome, venue by any comparison. When there is a big game, and our fans are "into it" (#gopherspsu2019) - that's as good a college atmosphere as any I've had the great pleasure, and extreme fortune, to have witnessed personally.
Go Gophers!!!