The Guardhouse or Caretakers hut in Machu Picchu is the most popular photography spot. Here is where the classic panorama is taken.

Machu Picchu architecture explained

Machu Picchu is almost the only Inca site in Peru that survived the Spanish invasion and the last 500 years unscathed. As such, it is one of the few places where you can experience the architectonical ingenuity of the Inca masons. Despite its picture perfect vista, few facts are known about Machu Picchu. The citadel remains a mystery, though the buildings hint at a glorious story.

Perfect walls in Machu Picchu - big stones havinge multiple edges

Roughly 200 buildings survived throughout the ruins – all of them lost their wooden, straw-thatched roofs over the ages. But the decay stopped at the perfectly cut granite stones. These remain impeccable and showcase the unbelievable skill of the Inca masons. The technique of fitting stones without mortar is known as Ashlar. The Inca refrained from using mortar because the loose fitting was more resistant to earthquakes.

The most amazing part: Steel and other hard metals were unknown to the Incas. They cut the stones using bronze tools and harder stones. Judging from tool marks left on the stones it is most probable that the Incas pounded the stones into shape and not really cut them.

The sacred plaza of machu Picchu with the quarry behind it

If you look closely, you will find a quarry right inside Machu Picchu. The Inca citadel was, quite apparently, never finished. The heavy stones, some weighing more than 50 tons, were hewn right out of the rock. There was no need to transport them for longer distances. Given Machu Picchu’s elevated and secluded location that would probably not have been possible anyway. Smaller stones were transported to the various construction sites by lamas, while larger stones were pulled with ropes and levers. The Inca never invented the wheel as we know it.

The stone blocks were almost all finished on site, following the demands of the Ashlar technique. On some bigger stones, you can still find smaller indentations to secure ropes or for workers to get a better hold. Adobe and bricks were not used in Machu Picchu. Most residential houses probably had a light finish consisting of ground stones and sand. It is not known whether the walls have been painted afterwards. From other sites, we know that religious houses often featured golden panels, while normal houses sometimes were painted.

The architecture of the houses in the industrial sector in Machu Picchu

All houses follow a rectangular ground plot, with the temple of the sun being the only exception. This is a pattern known from other Inca sites as well (and actually applies to our modern cities as well – where only a few public buildings are not more or less rectangular). The walls are rather irregular and follow the shape of stones, and not so much a strict geometry. Sometimes you will find niches – used to place holy objects or mummies of the ancestors.

Inward leaning walls in the residential area of machu picchu

All buildings are one-storied, though some buildings might have housed an attic. Not all of them feature windows, but if they do, they are usually trapezoidal. The walls are usually slanted, with rounded corners and L-shaped support elements. The roofs would probably have been very steep (about 60 degrees) as it rains a lot in Machu Picchu. Underneath hides a perfect drainage system that still works until today. Little channels crisscross the whole Inca citadel, and obediently carry away all the water during the heavy rain falls that frequently occur.

Water drains below the city wall of Machu Picchu

It’s not only the houses that deserve notice. Machu Picchu is surrounded by perfect terraces. They do add to the drainage system and were naturally also employed as fields to grow crops. Quinoa, Maize, and potatoes were probably grown here. Some maybe even in a religious context.

Machu Picchu as seen from the peak of Huanya Picchu

Everything is connected by perfect stairs, some of them quite steep, but still in good shape. If you look closely you will notice that Machu Picchu is divided into different, easily recognizable districts. Most apparent is the city wall closing off the agricultural sector with its many terraces. But also within the actual city limits differences can be seen.

On the left-hand side, you see the royal compound, with its perfectly cut stones. Not even a needled will fit in between the stones. On the right-hand side, you will see a large residential area, with houses not as perfectly set. These interconnected houses are known as kanchas, and were probably home to larger families. In the royal sector, you will find larger building units, known as kallanka. These usually had multiple doorways, facing an open square. These were used for smaller, public gatherings.

Peculiarities of Machu Picchu’s architecture

Perhaps most notably is the fact that the Incas followed the terrain rather than applying the conventional layout of other classical Inca cities. Usually, the palaces and temples were built on an elevated area. In Machu Picchu all buildings follow the more or less same design, creating one consistent unit. This led scientists to believe that Machu Picchu must have been a royal country estate, and not a regular city. It is the reason why it is often called a citadel.

The Intihuatana stone in Machu Picchu, standing at the very top of the sacred district.

The Inca were a religious people, revering nature and the gods that shaped it. This is most apparent in the architecture. For example, the temple of the sun stands on a particularly big granite rock. The intihuatana stone is hewn right out of the mountain and the temple of the Condor, too, makes use of the natural stone to create the impression of gigantic spread wings.

Last but not least it is again important to note that Machu Picchu had a city wall. This is very untypically because war among the Incas was not the kind of all-out warfare we know today. Much like in ancient Greece, battles were set-pieces that rarely involved the destruction of cities. Only very late cities (like Ollantaytambo) feature such fortified structures – to ward off the Spanish invaders.

Machu Picchu with its city wall clearly visible in the forground.