Charles Blair Macdonald, Seth Raynor, and Charles Banks designed courses using what came to be called Template holes. Few of these courses exist and even fewer are open to the public. This is a list of all the public courses designed by those three, plus a few other courses designed to be tributes to the work of these designers.
Downers Grove Park District Golf Course, Downers Grove, IL (9 holes)
Greenbrier (Old White)
Greenbrier (Old White), White Sulphur Springs, WV
Hotchkiss School Golf Course, Lakeville, CT
Thousand Islands Country Club (Old), Wellesley Island, NY
Francis Byrne Golf Course, West Orange, NJ
Hendricks Field Golf Course, Belleville, NJ
Hotchkiss School Golf Course, Lakeville, CT (9 holes)
Knoll Country Club (West), Parsippany, NJ (Limited Public Accessibility)
Of these, The Old White is by far the best.
Downers Grove is pretty much Macdonald in name only at this point, having most of the classic features stripped away according to reports.
Thousand Islands claims to be Raynor, but this is disputed by the Raynor Society.
Hotchkiss School has degraded over time, but still makes the Top 25 nine holes courses in Anthony Pioppi's book indicating its quality.
Francis Byrne is degraded but still has a number of excellent Template variations. The Road, Biarritz, Bottle, and Raynor Prize Dogleg holes are all stellar. There's also a Cape hole that could be incredible with a relatively inexpensive restoration. This course could be incredible with just an inexpensive restoration of original bunkering.