Great place to go to with a friend who is a visito...

Great place to go to with a friend who is a visitor/tourist to the city, but probably not something I would go to otherwise. They don't seem to hold events (e.g. like they do at the CalAcademy in SF) or change things up very much, so if you've been once, there's not too much reason to go again, except maybe to see the adorable penguins again. Bring your camera to remember things by!