A treasure map leads to the discovery of a lost fortress; a sacred altar is unearthed after 1,500 years, revealing secrets of the legendary Maya Snake King uprising; Albert Lin travels to two cities in the remote jungle, where technology reveals evidence of a forgotten war.

Albert Lin follows the treasure map to a pyramid at the heart of the most famous ancient Mayan city; divers search for an entrance to a flooded cave beneath a Mayan pyramid; archaeologists find a ceremonial royal drinking cup that reveals the tomb of a lost king.