Listener Gary Pilgrim was taking a drive across the Bay Bridge with his new wife when they decided to stop at Treasure Island. After taking in the sweeping views, he wondered how this manmade island came to be in the first place, and what it's future holds. We're answering Gary's questions in a two-part series exploring the island's past and future. This week: How was Treasure Island made, and why?

Additional Reading:

How Treasure Island Got Made — and Why

Reported by Kevin Stark. Bay Curious is made by Olivia Allen-Price, Jessica Placzek, Katie McMurran and Rob Speight. Additional support from Julie Caine, Paul Lancour, Kyana Moghadam, Suzie Racho, Ethan Lindsey and Patricia Yollin.