Machu Picchu

The clouds often sit below you here. You are standing at 2,430 meters above sea level, on a narrow ridge between two green peaks. Stone terraces fall away in long steps toward the Urubamba River, which loops around the mountain far below. The air is thin and cool, and it smells of wet rock and cloud forest. More than a million people a year make the journey to see this view.

This is Machu Picchu, a royal estate of the Inca empire. Most scholars believe the emperor Pachacuti ordered its construction around 1450. It served as a retreat for the ruler, his family, and his court. Perhaps 750 people lived here at busy times, most of them attendants and workers who kept the estate running.

The Inca used this place for roughly one hundred years. When Spanish invaders reached Peru in the sixteenth century, Machu Picchu was quietly abandoned. The Spanish never found it. No church was built over its temples, and no colonial town grew on its plazas. Grass and trees covered the terraces, but the walls beneath stayed whole.

Farmers in the valley always knew the ruins existed. In 1911, an American lecturer named Hiram Bingham climbed the ridge, guided by local people. His photographs and articles introduced Machu Picchu to the wider world. Excavations followed, and over the next century the site became the most visited place in Peru.

Look closely at the walls as you walk. The finest buildings use a technique called ashlar masonry. Workers shaped each granite block until it fit its neighbors exactly, with no mortar at all. In the best walls you cannot slide a knife blade between the stones. The blocks also lean slightly inward, which helps them survive earthquakes. Lower walls, built for terraces and simple houses, use rougher stones set in mud.

The site divides into two zones. The agricultural zone holds long terraces that step down the mountainside. They grew crops for the estate, and they also anchored the slope against landslides. The urban zone holds temples, houses, workshops, and fountains, all linked by narrow lanes and more than one hundred stone stairways.

Near the highest point of the urban sector stands the Intihuatana. It is a pillar of granite carved from the living bedrock. The name is often translated as hitching post of the sun. Its exact purpose is not certain, but many researchers connect it to astronomy and ritual, because its angles relate to the sun's path through the year.

The Temple of the Sun is a curved tower of very fine masonry, one of the few rounded buildings on the site. At the June solstice, morning light enters through one window and falls across a carved rock inside. Beneath the tower is a small cave with careful stonework. Early explorers called it the Royal Tomb, though no royal burial was ever confirmed there.

Beside the main plaza stands the Temple of the Three Windows. Its three large openings frame the mountains to the east. Notice their shape. Doors, windows, and wall niches across the site are trapezoids, wider at the bottom than at the top. That simple shape makes a wall far more stable when the ground shakes.

Water still runs through the city. A stone channel carries spring water from the mountain into a chain of sixteen fountains, dropping gently from one to the next. Under your feet lies the part you cannot see. Archaeologists estimate that more than half of the construction effort went into foundations, drains, and layers of crushed stone.

Llamas graze on the grass plazas today. They keep the lawns trimmed and pose calmly for photographs. Behind the ruins rises the steep peak of Huayna Picchu. A narrow Inca path climbs to small temples near its summit. The climb needs a separate permit, and only a limited number of people may go up each day.

Machu Picchu became a UNESCO World Heritage Site in 1983. In 2007, a global poll named it one of the New Seven Wonders of the World. Daily visitor numbers are now capped, and tickets follow fixed circuits, so that millions of feet do not wear away what five centuries preserved.

Before you leave, find a quiet terrace and sit for a moment. The people who built this place cut granite with harder stones and moved it without wheels or iron tools. Their empire lasted barely a century after the first block was set. The walls are still here, holding their line against the mountain, waiting out the clouds.