If you are looking for an authentic hiking experience of Machu Picchu, the Salkantay trek is a great way to go. In 5 days you can hike the 2nd highest mountain in Peru, visit two beautiful lakes, camp in 3 different scenic areas, and visit the historic site of Machu Picchu. On the trek I saw a variety of flora and fauna and visited the Santa Teresa Hot Springs. It was a challenging trek, but a once in a lifetime experience.