Yes, there are some good places to play in Minnesota.
According to Google maps, it is 4.6 miles (by car) from Interlachen to Minikahda.
It is also only 4.8 miles from Interlachen to Minneapolis Golf Club (1959 PGA Championship).
And it is 6.5 miles from Minneapolis to Minikahda.
While there might be three former major championship venues located closer together in Philly or in the NYC area, this isn't bad for flyover country.
Minnesota is one of only two states that have hosted every USGA championship. According to the program I picked up at the women's open, there are actually 19 different courses in Minnesota that have hosted USGA championships. Here is the list for anyone that is interested:
Hazeltine National (70 Open, 91 Open, 83 Sr. Open, 66 Women's Open, 77 Women's Open, 94 Mid-Am, 06 Amateur, 01 men's state team)
Minikahda (1916 Open, 27 Amateur, 57 Walker Cup, 88 Women's Am, 98 Curtis Cup)
Interlachen (30 Open, 35 women's am, 86 sr. am, 93 Walker Cup, 08 women's open)
Somerset (56 sr. am, 95 sr. women's am)
Braemar (79 WAPL)
Bunker Hills (76 APL)
Edinburgh USA (92 APL)
Gross (64 APL)
Golden Valley (88 Girls Jr.)
Keller (31 APL)
Meadowbrook (47 APL)
Minneapolis (50 Am)
Northland (56 Women's Open)
Rochester (93 women's mid-am)
Rush Creek (04 APL)
Town and Country (51 women's am)
U of M (58 Jr.)
Wayzata (84 Jr.)
Woodhill (01 women's state team)
Now there are some courses on this list that I don't like and/or wouldn't pay to play, but the depth of pretty good golf in Minnesota is deep. It's a state with more top notch courses than votes in the electoral college. To me, that's pretty good.