Marincello was a failed devolpment project in Marin County, California that would have put a metropolis full of homes, apartments, and hotels in a planned community atop the Marin Headlands, overlooking the Golden Gate. Its upheaval set the precedent for Marin County's rigid anti-development stance and push for open space. History Pre-Marincello Years The land making up the Marin Headlands was purchased by the military when the United States annexed California in the 1850s to help protect the B… (More on Marincello)