In Los Angeles USA a mining engineer named Warren Shufelt was inspecting the area for oil gold and other valuable materials using a new device that he himself had invented.
Shufelt was extremely puzzled one day as he took readings near downtown Los Angeles. His instruments showing him what appeared to be a pattern of underground tunnels so he proceeded to draw a map what he discovered appeared to be a well-planned subterranean labyrinth with large rooms located at several points gold deposits inside chambers and corridors.
Some of the tunnels traveled 30 kilometres underground which he believed were only used for ventilation unfortunately shufelt had no idea that they were connected to the oldest ruins of an even larger city that was covered by the Pacific Ocean thousands of years ago during a great earthquake and subsequent floods the underground complex.
Source: Incredible News E3