Make sure that you are in shape before you plan on taking the hike, remember that you'll be climbing through 14,000 foot mountain passes. Outstanding countryside, but there is real danger for the unprepared.
At Machu-Picchu take a hike up Huayna Picchu, the peak overlooking the ruins, there is a decent trail to the top, about an hour climb, superb views of the ruins and surrounding area!
[This message has been edited by Old Gold (edited 09-20-2000).]