Well now if we combine these ideas we might be able to form some kind of tour for Nain and Kara.
We're going into town first so we could start with wandering that and looking at all the different trades going on. Nain is a craftsman (or dwarf) after all so might he be interested in that?
Then we could head out of town to some of these Gondorian ruins. Those would presumably be made of stone? Perhaps it could be like when you go to an old castle and all you can see of how it was is the small inch or so high remains of the walls.
By this time it would probably be lunch and so we could head to the more picturesque parts of Edoras with open plains and little waterfalls, and stop in some nice place for a bite to eat.
And then on the way home we could pass old burial mounds and Nain could have a wonderful time explaining the old customs and how tombs were shaped to Kara.
If this sounds like absolute rubbish please feel free to tell me.