The Temples of the Sun & Moon (Huacas del Sol y de la Luna) are situated in a desert valley to the south of Trujillo and date back to the Moche era of 200 – 600 AD. The larger Sun Temple can only be appreciated from the outside as excavation work continues within and, despite its obvious erosion, the scale of this structure is undeniably impressive (over 100 million adobe bricks were used in its construction, and one of the theories is that it once served as an enormous ceremonial site). The nearby Temple of the Moon is better preserved and much restoration work has been carried out here – taking in the colourful and intricate friezes still visible on the temple walls is usually the highlight of any visit here.