The aquarium is the must see feature of the Silverton and we travelled to see it and the Mermaid show. However it turns out the show is only on Thursday through Sunday, so we didn't get to see that. The aquarium tank is good fun to look in, but asides from that (which won't take up much time) there isn't anything else to see really.
If you've got a car it's worth seeing, as it is easy to get to. If not, I wouldn't bother making the effort.
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