For 10 points, name this network including rope bridges and areas paved to accommodate llamas, which connected sites in a South American empire such as Cuzco and Machu Picchu.
A modern-day tour of this system's remains was described in a 1955 book by Victor Wolfgang von Hagen. Granaries called qollqa and administrative buildings called tambo were constructed as a part of this system, which was used by professionals who carried a pututu, or conch-shell trumpet. The Qhapaq Ñan was the central corridor in this system, which was begun by the Wari Empire. Commoners were banned from this system, on which chasquis relayed colored (*) strings of knots called quipu to transmit messages. For 10 points, name this network including rope bridges and areas paved to accommodate llamas, which connected sites in a South American empire such as Cuzco and Machu Picchu.
A modern-day tour of this system's remains was described in a 1955 book by Victor Wolfgang von Hagen.
Incan roads [accept Incan trails, the Incan highway system, or other equivalents; accept Tawantinsuyu in place of \"Inca\"]