Machu Picchu is one of the most-photographed sites in the world, and the reasons are structural: a distinct silhouette, dramatic ridge geography, and light that works at multiple hours of the day.
The classic composition — citadel in the foreground, Huayna Picchu rising behind — is from the Guardhouse viewpoint on the upper agricultural terraces. Arrive on the first morning bus from Aguas Calientes for the mist; wait until 8:30am for the clean version.
Secondary viewpoints: the Sun Gate (Inti Punku) at the end of the Inca Trail, for the long-lens shot down the ridge; the Inca Bridge trail, for the drop into the Urubamba gorge; and the Huayna Picchu summit itself if you have a permit.
Inside the site, close-ups of the Intihuatana ritual stone, the Temple of the Sun, and the mortarless masonry are worth as much space on the memory card as the landscapes.
For tickets, transfers, and timing, see Peruways.
A single visit gives you enough variety for an entire portfolio.
