The Chachapoya - the name the Inca gave them, sometimes translated as 'cloud warriors' - lived in this high forest country between around 800 and 1470 CE, until the Inca finally conquered them just decades before the Spanish arrived. Their architecture is distinctive: circular stone houses on ridgetops, fortress complexes like nearby Kuelap, and funerary monuments unlike anything else in the Andes. At Pueblo de Los Muertos, they built what look like rectangular miniature houses - mausoleums, really - set along natural ledges high in the cliff. Each one holds multiple interments; these were not single graves but collective tombs for people important enough to earn a view. The roofs are symbolic, made of clay and reeds supported on sticks in the quincha form. The real shelter is the cliff overhang above them, which has kept rain off the buildings for more than five hundred years.

What makes Pueblo de Los Muertos so striking from a distance is the color. The Chachapoya whitewashed the facades, then painted figures on them in ochre red - abstract human forms, geometric shapes, sometimes faces that stare out over the valley with hollow eyes. Some of the tombs once held carved wooden statues of ancestors that projected out over the cliff edge, looking down toward the river. Most were lost centuries ago to looters, to rain, to time. What remains are the empty houses, the fading paint, and the sense that these were not meant to be hidden the way Egyptian tombs were hidden. The Chachapoya wanted their dead to be seen.

The site sits at around 2,800 meters above sea level in terrain that is neither Andes nor Amazon but something in between. This is cloud forest - bromeliads clinging to everything, orchids in the trees, a damp chill in the morning that burns off by midday. The Chachapoya chose locations like this not just for defense but for visibility; the cliff faces they used are oriented to be seen from across wide valleys, turning their cemeteries into monuments you can read from kilometers away. Getting to Pueblo de Los Muertos still means a long walk through muddy forest from the village of Lamud, climbing through a landscape that hasn't really changed since the burials themselves were carried up here on someone's back.

The mummies the tombs once contained are mostly gone, destroyed by rodents or taken by looters long before archaeologists arrived. Henry and Paule Reichlen, working in the 1940s and '50s, were among the first to systematically document the site, and they estimated the construction dated to around the 14th century. Later work by the Antisuyo expeditions in the 1980s identified dozens of similar groupings in nearby valleys - Revash, Ochin, La Petaca - each a different cliff, each holding its own community of the dead. What remains at Pueblo de Los Muertos is the architecture itself: the walls of piled stone and mud mortar, the fragmentary murals, the empty rectangular rooms. These were collective residences for the prestigious dead, and they still look like a neighborhood - a row of houses on a good street, with a view.

Pilots who have flown the eastern flank of the Andes know how the terrain disguises its own history. The cloud forest hides entire Chachapoya cities that were lost for centuries. Pueblo de Los Muertos was never really lost - local people always knew about it - but it was the painted facades that eventually drew outside attention: an anomaly of color against limestone, visible from across the Utcubamba valley. The Chachapoya built it that way on purpose. If you are going to bury your ancestors where the sky meets the cliff, the thinking seems to have been, you might as well let the whole valley see them.