The Inca road system (called Capaq Ñan in Quechua and Gran Ruta Inca in Spanish) was an essential part of the success of the Inca Empire. The road system included an astounding kilometers miles) of roads, bridges, tunnels and causeways.
The Inca also raised llamas and alpacas for their wool, meat, and to use them as pack animals; they captured wild vicuñas for their fine hair. The Inca road system was key to farming success as it allowed distribution of food over long distances. They had no wheels, so these were paved footpaths for people and pack animals, straight and solid and sometimes 30 feet wide.