Anne,
Our stay was at the Liberatore in Cuzco and we thoroughly enjoyed it too. The meal at MP was at the Sanctuary Lodge. It was true at that time, if you were to stay at one, you had to stay at the Hotel Monasterio in Cuzco.

Doug,
We had two nights at Iguazu Falls. You definitely need two nights to do exactly what Fred said. Allowing time to hike both sides and to go on the zodiac trip under the Falls is thrilling. We stayed at the Sheraton on the Argentinian side with a beautiful view and balcony to sit out and enjoy the sites. Take mosquito repellent too. It was HOT!

Enjoy,
Deanna