Text in English & Spanish. This book on the Chilchos Valley in the northeastern slopes of the Andes in Peru attempts to understand how human activities have changed the landscape in the montane forests during the last 500 years. Settlements and terraces from the Chachapoya and Inca cultures in the Ceja de Selva (high jungle) witness of an ample use in pre-Hispanic times. Later after a drastic declination of the population in the colonial period the Chilchos Valley was forgotten in hundreds of years and then rediscovered and revisited in 1900. Within the stage of rediscovering the valley, new socio-cultural processes of adaptation to the environment began with migrations from the Sierra. This book includes archaeological, historical, sociological and botanical studies of a corner of Peru, which has hitherto not been given much scientific attention.