Along the Inca Trail is a variety of flora. Most of the trees on the edges of the ridges are relatively stunted, due to the winds. Take some time to look around. It is easy to get focused on the trail ahead and your own feet, to avoid stumbling. Don't forget to look up and around.
There are a tremendous number of orchids. If you are
a photographer, be ready to shoot in low light. The orchids are very small (about dime-sized), so with the low light it can be difficult to get good shots. Remember, you probably won't be lugging around a tripod...at least not if you are carrying your own backpack. You might consider having a porter carry your pack (it's about $50 for 4 days), allowing you to carry a bit more photo gear.Look for some of the less obvious scenery. There's some weird s
tuff in South America (at least to North American eyes). Here's a shot of a butterfly-shaped fungus. I badly wanted to take this with me, but that would not have been appropriate. It is probably illegal to take things from the trail, but even if it isn't, preserve it as best you can. The number of visitors to the trail these days is extremely high, so the chances of destructive behavior are high.
