Olan

A population center built on top of a hill, with the remains of 500 circular houses constructed by the Chachapoyas culture (1100-1300 AD). Notable for the wide expanse of its ruins and its impressive construction techniques, the mortar used to hold the stonework together here is hidden from the naked eye. The town was an artistic center, and contains larger than usual stone frieze decorations. The site is surrounded by modern farms and cultivated land.