Unless you’re running, this won’t be a sweat-inducing outing, but what you lack in calories burned you’ll make up for in countless other ways. A journey back in time, Alviso was going to be the cultural hub in the South Bay until a few events transpired — the state capital moved from San Jose to Sacramento, and muddy conditions among others. Now it’s a bird watchers paradise, with miles of trails around the marshes that are both bike and wheelchair friendly.