It was the last day of our trip and, having already seen some geothermal areas and spent a fair bit, my husband and I weren't sure whether we should go to Orakei Korako. However, the photos and descriptions on their website convinced us to give it a try, and we are so glad we did!
We bought our tickets online to get the 10% discount then just had to the staff our reference number and email address. We had lunch at the café then caught the ferry across the lake. It's beautiful just to look at from the café and boat but gets even better once you land.