Chan Chan was originally constructed around 850 A.D and served as the imperial capital for the Chimu people. It remained so until the Inca conquered the Chimu around 1470 A.D. The Chimu were expansionists just like the Inca and their empire stretched over much of the coastal region of northern Peru at the height of their success. The Inca tried to take over Chan Chan in 1462, but had great difficulty defeating them eventually triumphing by inhibiting the irrigation channels that supplied water to the citadel.
Chan Chan is the largest adobe city in the world covering roughly 7.7 square miles and has been declared a UNESCO world heritage site. It is located about 5km outside of Trujillo on the road out to the beach side resort of Huanchaco. In fact the road to Huanchaco drives right through the middle of the remains.