With its seven defensive walls, the gigantic fortress at Paramonga is worth a look. A small museum has interesting displays on Chimú culture. The archaeological site sits just off the Pan-American Highway, about 3 km (2 miles) north of the turnoff for Huaraz. For a few soles you can take a taxi to the ruins from the nearby town of Barranca.
Pan-American Hwy., Barranca, Peru