My situation is similar to that of the original poster. Flying into and out of LIM alone this September, have 5 full days, would like to see Machu Picchu on the ground and Nazca Lines from the air.

I'm wondering about altitude sickness in Cuzco. How uncomfortable is it, and for how long? What do they do for those occasional unfortunates whose medical condition necessitates relocation to a lower altitude?
This page has some altitude sickness information, with references to the altitudes of Cuzco (3225 m) and MP (2440 m).

Also, there was a news item about a month ago about a big mudslide down the hill from MP, and maybe it took out part of the railroad track to Cuzco. Has it been fixed or the damaged area bypassed?

And finally, can someone suggest a good B&B in Cuzco?

Thank you.