Welcome to my channel! I'm Brien Foerster, and I take you deep into the mysteries of ancient civilizations, lost technologies ...

The survey used light detection and ranging (lidar) technology ... Now named Valeriana, this lost metropolis is believed to be one of the densest Mayan cities ever discovered.

Lidar technology is revealing that the Mayan civilization was more complex and interconnected than previously thought.

Discovering Maya cities used to involve bushwhacking ... So one of his interests was GIS, or geographic information systems. As a technology, lidar, short for "light detection and ranging ...

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That the Maya built their cities based on constellations, and according to his research, there should be a missing ruin hidden in the Mexican jungle. The Teenager and the Lost Maya City ...

Archaeologists have suspected there was more to the Maya sites - Tikal ... a type of remote sensing technology. For an in-depth look, read the BBC Travel story here. This is part 1 of 3.