Machu Picchu is one of those places that actually lives up to the hype, especially if you catch the sunrise over the stone ruins in the Sacred Valley. You will want to plan for at least a week to adjust to the altitude and explore Cusco before you head up the mountain.
A trip like this usually runs around $3400, so it helps to have a plan for how you handle that cost. Using the Discover it® Cash Back card gives you 0% intro APR for 15 months on purchases, which lets you spread that $3400 bill into smaller chunks over that time.
The 0% intro APR is just a window to pay off your trip without interest, not free money. If you still have a balance once those 15 months are up, you will start paying interest on the remaining amount.