This is the Presidio site where they've built a playground over the sacred burial grounds of our people. (The left arrow from the words "Tidal Marsh" in the picture points to the location of a "shellmound" discovered in 1912.) The National Park Service knows about this burial site, as well as other Ohlone finds nearby. And the Native American Graves Protection and Repatriation Act should have stopped the playground in its tracks.