A literally unbelievable discovery comes from South America, and specifically from the territories that once belonged to the Mayas, one of the three great pre-Columbian civilisations along with the Incas (Peru) and Aztecs (Mexico). In the territory between present-day Guatemala and Mexico, in fact, a huge network of highways has been discovered.
The complex of roads and bridges dates back as far as 3000 years, and the team of scientists who made the discovery compared it in importance to the discovery of the Egyptian pyramids. It is estimated that the 'highway' continues for hundreds of kilometres and intersects some 417 ancient Maya settlements.
For this discovery, a new technology called lidar was used, an advanced type of radar that reveals presences hidden by dense vegetation, resulting in 3D reconstructive images.