Let's take a look at the Columbia today! In the first image, this tribute to the first American ship to sail around the world is brand spankin' new, having debuted less than a month earlier (the "below decks" museum wouldn't be opened for another six years). Is that the little riverfront gazebo to the left? Looks like the Strawhatters would be playing sometime later.
In this second photo (from 1961), we get a deck's-eye view of things. Looks pretty crowded. Cascade Peak is dead ahead, if you look closely you can see the bighorn sheep (only the pointy bits at this angle). A little girl is more interested in the boat than the scenery. You can see in this photo how beautifully crafted the Columbia is, no detail was too small.