Perou Decouverte
Perou Decouverte
Marcahuasi is a rocky plateau of approximately 4 km² located in the Huarochirí province, at about 4000 m above sea level. Its name, of Quechua origin, means “house of the protector” or “big house”. It is known for its impressive granite formations that, shaped by erosion, take on human and animal forms, giving rise to mystical theories and legends. In recent decades, Marcahuasi has also become a reference point for astrotourism and for those seeking experiences related to mystery and night sky observation.
The plateau is located in the San Pedro de Casta district, about 90 km east of Lima. Access from the capital takes between 3 and 4 hours by car and requires taking the Carretera Central to Chosica, then turning toward Santa Eulalia and finally ascending via a dirt road to San Pedro de Casta.
The Marcahuasi territory lies between 3800 and 4100 m above sea level. The climate is typical of high mountains: during the day the sun is intense and temperatures can exceed 20 °C, while at night they frequently drop below 0 °C. The dry season (May to October) offers clear skies ideal for camping and stargazing; the rainy season (November to April) brings greener landscapes but a higher likelihood of rain.
Marcahuasi combines nature, archaeology, and an atmosphere charged with mysticism. Its trails lead to formations such as the Monument to Humanity — a human profile sculpted by nature — and the Amphitheater, a sheltered area that once served as a campsite and now holds a small lagoon. Moreover, its night sky, free from light pollution, allows for clear views of the Milky Way, attracting photographers and astronomy enthusiasts. Reports of mysterious lights have added an extra appeal for those interested in ufology tourism.
Take the Carretera Central to the Chosica district. From there, continue toward Santa Eulalia and follow the road leading to San Pedro de Casta (approximately 35 km of dirt road). The road is winding but passable for standard vehicles, though caution is advised during rainy periods. From San Pedro de Casta, the final ascent to the plateau (about 4 km) can be done on foot or, if road conditions permit, with 4×4 vehicles.
Total duration: 3 h 30 – 4 h.
Parking: in San Pedro de Casta, there are designated areas to leave vehicles (reference cost S/ 5–10).
It is also possible to hire muleteers with donkeys to transport camping gear (approximately S/ 20).
Several agencies in Lima organize weekend or full-day excursions to Marcahuasi, with transportation, guide, and sometimes camping equipment included. This is a recommended option for those who prefer not to handle logistics or who travel alone.
This is the most favorable time for camping and outdoor activities. Days are usually sunny, nights are cold and clear, allowing excellent stargazing and Milky Way observation. Nighttime temperatures can drop below 0 °C, so proper warm gear is necessary.
The landscape becomes greener and lagoons rise, but rain can make the ascent and camping difficult. Roads become slippery and the sky is often cloudy, reducing astronomical observation opportunities. If traveling during this period, it is essential to bring waterproof clothing and check the forecast before leaving.
The Marcahuasi plateau is organized into three circuits marked with colors (red, green, and blue), allowing visitors to explore the most emblematic formations. The main points of interest are:
The most photographed formation in Marcahuasi. It is a huge granite rock that, when viewed from a specific angle, reveals a human profile with defined features. It is the mystical icon of the plateau.
Formerly the preferred camping spot, as its large rock walls sheltered from the wind. Today, after years of water accumulation, a lagoon has formed that reflects the surrounding formations, creating a landscape of great beauty.
The highest point of the plateau. From there, you get a 360-degree panoramic view of the Santa Eulalia valley and the rest of the highlands. At the top stands a monolith that some consider a ceremonial altar.
A small naturally occurring lagoon in the central part of the plateau. Its waters are greenish and on clear days reflect the sky. It is a peaceful spot, ideal for resting during the hike.
A narrow passage between rocks where the wind produces a characteristic whistle. It is considered a point with strong energy according to local beliefs, and is often included in mystical circuits.
At various points on the plateau, remains of pre-Hispanic funerary structures (chullpas) and fragmented pottery can be found, evidence of human occupation long before the arrival of the Incas.
The trails of Marcahuasi are of moderate difficulty, with gentle slopes that are felt due to the altitude. It is advisable to walk slowly, stay hydrated, and use sun protection. The routes are marked and do not require a mandatory guide, though hiring a local guide can enrich the experience with historical and mystical stories.
Camping in Marcahuasi is a unique experience. The site allows tents to be set up in several areas, especially near the Amphitheater or in flat areas close to the formations. There are no drinking water or electricity services, so you must bring everything you need: a wind-resistant tent, a sleeping bag for sub‑zero temperatures, a headlamp, food, and enough water (at least 2 L per person per day).
In the camping area, during weekends and holidays, small stalls offer tent rentals (S/ 25–40), sleeping pads (S/ 10), firewood (S/ 15), and simple meals (from S/ 15). There are also shared toilets (S/ 1).
Marcahuasi is one of the best places in the Lima highlands for astronomical observation thanks to its altitude, clear skies, and lack of light pollution. You can see the Milky Way with the naked eye, as well as southern hemisphere constellations. Some local organizations offer astrophotography workshops and guided observation sessions with telescopes, especially during the dry season and on new moons.
Since the 1970s, Marcahuasi has been the setting for stories of mysterious lights in the night sky. Although there is no scientific evidence, many visitors report phenomena that fuel the mystical aura of the place. Enthusiast groups organize night vigils to observe the sky and share experiences.
Payment is made at the tourism office located in front of the San Pedro de Casta square. A brochure with the circuit map is provided.
There is no scientific evidence, but reports of strange lights have been recurrent for decades. The dark sky and mystical atmosphere of the place lead many visitors to report unusual experiences. For those interested, night vigils during new moons are the most conducive.
No, the circuits are marked and a map is provided. However, a local guide can provide historical and formation-related information not found in the brochures.
You can drive to the parking area about 30 min walk from the camping zone. The final stretch is a dirt road; during the dry season it is passable for cars, but caution is recommended.
No, only camping is allowed. In San Pedro de Casta, there are simple lodgings from S/ 30 per night for those who prefer to sleep at a lower altitude.
In one full day, the main points can be visited. For a more relaxed experience and to enjoy the sunset and night sky, spending one night camping is recommended.