it's on the marina, very famous , iconic structure by bernard maybeck, who the architect, for a long time it housed the exploratorium, not any longer, but it housed exhibits over the years. that's the marina, and the 1939 fair, treasure island, still exists. the island is still there and some of the buildings still exist. a lot of them were destroyed. a lot of the sculptures, the huge 80-foot tall pacifica sculpture was toppled, sadly, and there is an active museum association at treasure island that's trying to raise money for saving as much of that as possible. there is ongoing preservation effort to try to safe as much of treasure island as they can. host: and one thing that we just learned in our conversation before we sat down, the world fair continues today, although maybe not here in the u.s. prof. markwyn: they do. most people are very surprised to learn that there are still world fairs today. the bureau of international exposition is the governing body, and if you google them you , you can find out more. it was founded in the 1920's, and it's the official international body