The group of ten largest businesses in CE includes another two companies operating in Poland: the state owned energy group PGE (the eighth position, up by one slot compared with the 2011 edition), and Jeronimo Martins, Portuguese retailer running a Polish supermarkets chain Biedronka (the tenth position, flat y/y).
Part of the road network was built by cultures that precede the Inca Empire, notably the Wari culture. During the Spanish colonial era, parts of the road system were given the status of Camino Real. In 2014 the road system became a UNESCO World Heritage Site.
For a military empire, this is crucial. Incan cities were built high in the mountains on cliffs that dropped hundreds of feet. As a result, the Incas were in great shape and were some of the best runners in history. Mountains have lots of natural resources to sustain civilization, including fresh water and food.