Researchers discovered 60,000 hidden Mayan structures and a vast city complex at the Mayan city of Tikal using Lidar, the same technology used to guide self-driving cars.
The discovery found houses, palaces, elevated highways and defensive fortifications and suggestions the population was millions more than previously believed.
Most of the structures are stone platforms for pole-and-thatch Mayan homes.
One discovery is a seventy-foot high pyramid.
They also discovered a "complex network of causeways linking all the Mayan cities in the area."
These "raised highways" enabled easy passage even during rainy seasons."