"We see two grizzled human adventurers standing atop a low hill. One of them holds up a map covered with terrain markings and an obvious X denoting a location. The other points out at the vista before them. The hill they stand upon overlooks a large valley filled with jungle. A river winds through it, and the mountains that ring it are tall and rugged and formidable. The most impressive feature in the jungle is a ruined lost city rising from the jungle canopy in places, or sprawling out on ruined bridges and islands on the lake. "