This pre-Inca site, 23 km (14 miles) southwest of Cajamarca, is surrounded by a large rock outcropping, where you'll find various petroglyphs left by the ancient Cajamarcans. There are also petroglyph-adorned caves so a guided tour is highly recommended. This site, discovered in 1937 by the famous Peruvian archaeologist J.C. Tello, also includes some of the most notable aqueducts in the Andes. Constructed around 1000 BC, the aqueduct was designed to direct the ample water from the Andes into the drier area of Cajamarca, where there was a large reservoir. Amazingly, more than 8 km (5 miles) of the ancient aqueduct are intact today. Guided tours cost around S/35 and take about four hours.