Why Is Part of Alameda Island in San Francisco?

The answer stretches back to 1820, when California was still a part of Spain. Reported by Ryan Levi. Bay Curious is made by Olivia Allen-Price, Jessica Placzek, Paul Lancour, Ryan Levi and Suzie Racho. Additional support from Julie Caine, Ethan Lindsey, Katie McMurran and David Weir. Theme music by Pat Mesiti-Miller. Ask us a question or sign up for our newsletter at BayCurious.org. Follow Olivia Allen-Price on Twitter @oallenprice, or use the hashtag #BayCurious.