This past September, I spent several days in near-perfect early-fall weather in Wisconsin at Milwaukee Country Club. I thought it was a terrific walking course -- not flat by any means, but for the most part gently rolling hills, with easy and quite logical (to me, a real key part of any course that's regarded as a good walking course) transitions from green to the next tee.
To me, a good walking course includes both logical transitions, some varied terrain, and interesting visuals beyond just the golf holes themselves. Here are a few views.
The course plays alongside the placid Milwaukee River in several stretches. Here is a view from alongside the par 5 15th.
From the elevated tee of the 10th, with the river in the distance. The club has made a special effort to clear trees and brush from the river banks to open up the views.
I like courses in which the terrain hides something beyond, and it's slowly revealed as you walk toward it. Here's the tee shot on the 18th hole, with the clubhouse just peaking above the fairway bunker beyond that's benched along a ridge line.
Here's the view once you crest the ridge-line -- the stately clubhouse framing the green.
Here's another view of the clubhouse -- this from the back tee of the short par 4 9th. I really like how the clubhouse sits in the background, and the golfer has a view of it during the entire length of playing this hole.