The Chachapoya flourished in the cloud forests of what is now northern Peru from roughly 900 CE until the Inca conquered them in the 1470s. Spanish chroniclers called them the White Warriors of the Clouds because they were said to be taller and lighter-complexioned than their Andean neighbors - and because they fought long and hard against both Inca and Spanish expansion. Their stone cities, circular rather than rectangular in the Inca style, cluster along ridgelines throughout the Amazonas Region. Kuélap is the best-known. The Chachapoya culture remained largely unknown to modern archaeology until the twentieth century; their written record was Inca and Spanish, written by enemies. The mummies at the lagoon are one of the only places where the Chachapoya speak somewhat for themselves.

Six mausoleums were found in the cave system, cube-shaped and arranged in rows. Three walls were built by hand. The fourth wall was the living rock of the cliff itself. Two stories tall, each mausoleum had upper-level windows engineered for air circulation - the humidity of the cloud forest is the enemy of preservation, and the builders knew it. The paintings on the cave walls around the mausoleums depict scenes related to the burials, with symbols whose meanings have not been deciphered. The coffins inside carried human-faced designs stitched onto their surfaces. The mummies themselves sat upright, bundled in textiles, some plain, others intricately decorated. This was not mass burial. It was a careful necropolis for people the Chachapoya wanted to remember in particular ways.

The initial estimate, when archaeologist Peter Lerche assessed the damage in 1997 on behalf of Peru's National Institute of Culture, was around seventy mummies. Salvage work raised the count: there had been more than 200 bundles. High-status individuals from the Chachapoya - and later, from the Inca officials who governed the region from nearby Cochabamba after the 1470s conquest - were all buried here. Alongside the mummies, the mausoleums held pottery, wooden carvings that looked like statues, clothing, silver objects, personal ornaments, and ceremonial items. The mummification techniques were sophisticated, designed specifically for the humid cloud forest climate. The Chachapoya knew how to preserve a body in an environment that should have rotted it quickly, and they applied that knowledge with patience.

In the 1990s, the people who first reached the mausoleums were not archaeologists. They were looters, who hacked into the tombs and removed what they could sell. Artifacts vanished into the international antiquities trade before anyone knew what had been taken. The robbers were eventually arrested, but by then many of the mummies had been destroyed or badly damaged. And the damage did not stop there. After the site became known, tourists climbed to the cave and handled the bundles - lifting them for photographs, unwrapping textiles, taking small items as souvenirs. Some mummies were pulled out of their coffins and exposed to rain. They decayed completely. What should have been an intact 500-year-old community of the dead became a fragmented record of how much can be lost in a single decade. The survivors were eventually moved to the Museo Leymebamba, where they rest under climate control today.

What the archaeologists recovered at Laguna de las Momias - the mummies, the coffins, the pottery, the textiles - now fills careful cases in a small museum built specifically for them in Leymebamba town, an hour or two away by road. The people they represent were once powerful figures in a civilization that fought Inca expansion for decades and built cities on ridges that still take breath away. Most of what they knew is gone. But their faces - the human features stitched onto coffin wrappings, still recognizable after five centuries - look out at modern visitors. A small triumph over the humidity, the looters, and the long silence. The mausoleums above the lagoon remain mostly empty now. The people of the clouds have been moved indoors, but they are still here.