For centuries, complex adobe structures, many of them quite massive, have been built in the Sahel region of western Africa—Mali, Niger, Nigeria, Togo, Benin, Ghana, and Burkina Faso. Made of earth mixed with water, these buildings display a remarkable diversity of form, human ingenuity and originality. In Butabu: Adobe Architecture of West Africa, lush, large-scale photographs by British photographer James Morris offer a stunning visual survey of these structures, from monumental mosques to family homes.