In this episode, we look back at a November 2014 archaeological expedition led by the Office of National Marine Sanctuaries Maritime Heritage Program. This mission brought back the first-ever 3-D images of the City of Rio de Janeiro, considered by many historians as the "Titanic of the Golden Gate." Listen in to this conversation with NOAA's Robert Schwemmer, co-leader of a two-year study to locate and document shipwrecks in California’s Gulf of the Farallones National Marine Sanctuary and the surrounding area.