Undoubtedly built in several stages, from the 8C to the 11C, the walled settlement of Kuélap was the largest edifice of the Chachapoya kingdom. Its huge proportions, protected by narrow entrances and a precipice, extend over 7 hectares. Don't miss the remains of some thirty, circular-shaped houses (of which there were 500 previously); the Templo Mayor, a holy shrine; the stunning view over the Cordillera, which dominates a gigantic geological fault.