The Incas had an extensive road system. A high road crossed the higher regions of the Cordillera from north to south and another lower north-south road crossed the coastal plains. Shorter crossroads linked the two main highways together in several places. The terrain, according to Cieza de Leon, an early chronicler of Inca culture, was formidable. The road system ran through deep valleys and over mountains, through piles of snow, quagmires, living rock, along turbulent rivers; in some places it ran smooth and paved, carefully laid out; in others over sierras, cut through the rock, with walls skirting the rivers, and steps and rests through the snow; everywhere it was clean swept and kept free of rubbish, with lodgings, storehouses, temples to the sun, and posts along the way.
The Incas did not have the wheel, as they had no draft animals, so all travel was done on foot. To help travelers on their way, rest houses were built every few kilometers. In these rest houses, they could spend a night, cook a meal and feed their llamas.
Their bridges, which were made from ropes ingeniously tied together to form a narrow but effective structure, were the only way to cross rivers on foot. If only one of their hundreds of bridges was damaged, a major road could not fully function. Fortunately, every time a bridge broke, the locals would repair it as quickly as possible.