Huánuco Pampa
Also known as Huánuco Viejo, this 2-square-km (0.8-square-mile) complex was formerly the capital city of Chinchaysuyo, the northern portion of the Inca Empire. The town was constructed in the late 1400s, during the reign of Túpac Yupanqui, and served as an important administrative outpost for the region. Here the Incas would temporarily house agricultural products en route from the Pacific coast to Cusco, as well as settle disputes among the vassal tribes their generals had overrun. When you visit, you'll find temples, storage areas, and kanchas (single-room structures encircling an open patio), all built around a central ushnu, or platform. Note the trapezoidal double-jamb doorways—an Inca hallmark. The site is near the small village of La Unión, a S/50 taxi ride from Huánuco. During the last week of July, the Fiesta del Sol (Sun Festival) takes place at the ruins.