QUOTE(durnadupa @ Apr 8 2010, 07:14 PM)

I spent two weeks in Peru and I only really got to see Lima, Cusco, and Machu Picchu. And even then I felt like I didn't really have enough time.
Lima - I wouldn't spend much time there at all. Outside of the odd museum and nifty architecture it struck me as a typical overpopulated and polluted South American city. But the people are incredibly friendly, just be careful about who you trust. No more than two days is really necessary here though.
Cusco - Incredible city. There is so much to see in the city proper and surrounded areas. Since you are doing your internship here spend the weekends exploring the surrounding ruins and sites.
Inca Trail - There have been alot of rains and floods on the Inca Trail recently, and last I heard the trail was actually closed till repairs are finished. I would definitely check if they are once again open. Also you need to book the trail in advance, and that's another thing you should look into.
If you can't get on the Inca Trail proper there are a variety of other trails to Machu Picchu...including the trail I did. It was cheaper and instead of hiking up high in the mountains we hiked in the jungle along the river all the way to Machu Picchu staying in jungle villages along the way.
Hope that helps!
Thanks for the info. Everyone says amazing things about Cuzco. I'm excited. Now if only I could find a good airfare...
Thanks for the caution on the Inca Trail but it was opened on April 4th and I made my reservations about a month ago for the end of May.
I think that after that I will head to the Amazon (North of South I am not sure). Then to Puno and Lake Titicaca, then to Arequipo and Colca Canyon, then to Nasca, Pisca, Ica and then to Lima for only a day or two before flying back to the US on the 15th.
How's that sound for a plan? Do-able? Anyone recommend expedition/tour companies for parts of that trip? I've heard it is good to take a 2 day tour for Lake Titicaca and good to find a tour for Colca and also for the Pisca/Islas Balletas.