California State Historical Landmark #529
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This landmark is located in Hospital Cove, Angel Island State Park, California. There are 13 other landmarks in Marin County. The GPS coordinates for this location are N 37° 52.006 W 122° 26.093.
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In 1775, the packet San Carlos, first known Spanish ship to enter San Francisco Bay, anchored in this cove. While here, the commander, Lieut. Juan Manual de Ayala, directed the first survey of the bay. This island, which Ayala named Isla de los Angeles, has been a Mexican rancho, a U.S. military post, a bay defense site, and a quarantine and immigration station.