All this time it's been buried in the dirt.
Some decades ago in San Diego, a mobile crane operator drove into a mud pit in Mission Valley. Couldn't get out. By the time the giant tow truck arrived the ENTIRE crane had sunk into the mud. Not just the cab, the whole vertical mast and all. It was gone.
Several years later as they were digging the foundation for Qualcomm Stadium they found it. More then two miles west. There is still a massive underground river in Mission Valley. Back in the 40's it flooded wall-to-wall. Hardly any San Diego river visible now. But it's still there underground.
