The Geological Tapestry and the French Legacy

The origins of the Laguna Verde and the towering Balcon de Pissis are written in the violent language of volcanology. Formed millions of years ago through intense tectonic activity in the Andes, this high-altitude basin is dominated by the presence of Monte Pissis, the third-highest peak in the Western Hemisphere. While the landscape is ancient, its name reflects a 19th-century chapter of scientific exploration. The mountain was named in honor of Pierre Aimé Pissis, a distinguished French geographer and geologist who was commissioned by the Chilean government to map the Andes. His meticulous work in the mid-1800s brought this remote, lunar landscape to the attention of the global scientific community, bridging the gap between raw Andean wilderness and European cartography.

The Sacred Heights of the Incas

Long before European geographers arrived, these peaks were of profound spiritual importance to the Inca Empire. The high-altitude lagoons and the surrounding “Seismiles” (peaks over 6,000 meters) were considered huacas, or sacred places. Archaeologists have discovered evidence of high-altitude sanctuaries throughout this region, where the Incas performed rituals to communicate with the mountain deities, known as Apus. It is believed that the Balcon de Pissis served as a natural lookout for ancient travelers navigating the trans-Andean routes, providing a vantage point to observe weather patterns and offer tributes to ensure safe passage through the treacherous mountain passes.

The Legend of the Yastay: Guardian of the Puna

One of the most enduring stories to share with travelers is the legend of the Yastay. According to local Andean mythology, the Yastay is the supreme protector of all wild animals in the Puna, particularly the vicuñas and guanacos that roam near the Laguna Verde. He is often described as a man of immense stature with a long white beard, or sometimes as a large guanaco with a shimmering coat.

The legend dictates that the Yastay allows hunters to take only what is necessary for survival. If a traveler or hunter is greedy or disrespectful to the land, the Yastay manifests as a vengeful spirit, calling upon the Viento Blanco (the White Wind) to disorient and consume the intruder. To this day, local guides may suggest leaving a small offering of coca leaves or a splash of water to the earth—a Challa—to ask the Yastay for protection before ascending to the balcony.

The Mystery of the Emerald Waters

The striking turquoise and emerald hues of the Laguna Verde are not merely a visual marvel but a testament to the complex mineralogy of the Fiambalá region. The water’s color shifts depending on the angle of the sun and the concentration of minerals such as copper, arsenic, and magnesium. An old local anecdote suggests that the lagoon is “living,” as its colors appear to pulse with the wind. Some mountain dwellers tell stories of “mineral ghosts”—shimmering lights seen over the water at dusk—which are likely the result of gas emissions from the volcanic soil, though legends prefer to call them the spirits of ancient miners who never returned from the heights.

The Spirit of the “Seismiles” Today

Today, the Balcon de Pissis is the crown jewel of the Ruta de los Seismiles. Its significance has evolved from a sacred Inca site and a cartographic challenge into a symbol of human perseverance. It remains one of the most isolated and pristine environments on Earth, representing the “Last Frontier” for mountaineers and explorers. For the local people of Fiambalá, the lagoon and the mountain are sources of pride, embodying the rugged, unyielding character of the Catamarca province.

Key Insights for the Journey

• The Name: Remind guests that while it sounds Spanish, “Pissis” honors the French scientist who first brought modern geography to these peaks.
• The Altitude: At nearly 4,500 meters, the Balcon is a place where the air is thin and the silence is absolute, emphasizing the “spiritual” weight the Incas felt here.
• The Wildlife: Keep a keen eye out for vicuñas; their presence is a sign that the Yastay is watching over your group.
• The Color Shift: Encourage visitors to watch the water for ten minutes; the transition from deep blue to vibrant green as the sun moves is a natural spectacle that feels almost supernatural.