We got up early doors to catch the bus up to Machu Picchu for sun rise. It is a stunning spot and I have around a 100 photos to prove it. Despite there being lots of people there it didn't feel crowded and I was able to get shots of it looking fairly deserted. It's pretty steep so it must have been fairly treacherous for the Inca toddlers.
It was only inhabited for 90 years, built in 1450 and abandoned in 1540 as the Spanish advanced through Peru.