Maui Girl, I'll be in Cuzco arriving AM of May 8 and leaving AM of the 11th. Would love to meet up with you guys for a coffee or a beer. From what I understand, you can go to Macchu Picchu in a day and back, but I have heard it is best to stay overnight. "One hasn't lived until one has seen sunrise at Macchu Picchu" or something like that. The trains leave in the morning, so you are unlikely to be able to go the day you arrive unless you take a helicopter out. In one of the other threads, there are details about the helicopter, and it wasn't too pricey. I'm going to MP on the 9th AM and returning 10th PM. Let me know your plans!