One of the best challenges I've seen and played occurred at Royal Adelaide GC. No wonder the ISPS HANDA Australian Women's Open was played here in Feb '17. Melbourne may have the renowned sandbelt, but Adelaide's "Redbelt" has stood the true test of time also, due to Dr. Alastair McKenzie's early design / philosophy on his trip to Australia in the 1920/30's. Ranked in the Top 10 at many times throughout the rankings history, and more recently the Top 15, Royal Adelaide GC is an excellent course that holds all the UK & IRELAND links course design & beliefs true to this day.
If you require a more detailed description of R. A than above, you will find my words echoed no doubt.
Date: April 30, 2019