Chaco Canyon is the most important vestige of the Anasazi civilisation. Imagine an urban area spread across nearly 4sq mi, with mysterious foundations and walls will extremely delicate masonry, illustrating the grandeur of this ancient people. The most impressive remains are on the north side of the canyon. Pueblo Bonito (600 rooms) best illustrates the complexity of Anasazi architecture. Enjoy magnificent views from the top of the mesa, which is reached via the Pueblo Alto Trail.