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USS Potomac
540 Water Street, Oakland
Attraction· 5 min from marina (390m)
This is the actual yacht FDR used as his floating White House from 1936 until his death in 1945 — now docked in Oakland as a National Historic Landmark you can board and explore. It's a surprisingly personal slice of history, giving you a real feel for how Roosevelt conducted wartime diplomacy and escaped the pressures of the presidency out on the water.