Every year I play a course that flies under the radar. I might have heard of it, but knew very little about it. Then, when I play I think, "Wow, this course should be known by more people than the locals that play it." I had two such experiences this summer.
The first is Elyria CC outside of Cleveland. It is one of three Flynn designs in the Cleveland area, (The Country Club and Pepper Pike). The terrain is relatively flat but has some very interesting landforms that FLynn used creatively. It is a primer of routing a course to make the best use of the terrain. Some of the green-sites are just wonderful. The greens have enough movement to make putting interesting but not so much that you will feel silly if you make a poor putt. It was in good condition and was a delight to play. It will not beat up a poor player but has enough interest to challenge a good player.
The other was Bloomfield Hills outside Detroit. I had heard of the course but thought it was just another of the "Hills" courses in the area. For years they thought the course was designed by Ross, but recent investigations have revealed that it was one of only a couple solo Colt courses in the US. It is in shouting distance from Oakland Hills and Franklin Hills, so the rolling terrain is similar. The course is routed up and down and across some of the hills. The greens do not have as much movement as OH but still are interesting and fast. Mike Devries just finished some work there. He moved the practice tee a bit and made 1 & 18 a double fairway. The bunkers were restored and the third and fourth holes changed to a long beast of a downhill par three and a long par four.
There are a lot of good courses out there.