So, about six years back I purchased a whole boatload of old Star Wars sets at a garage sale in the neighborhood, including the old Kenner Death Star and, what I thought at the time, the Hoth display set.
However, I recently started wondering if this was actually a Hoth playset, since I've never seen any pictures of any Hoth set that remotely looks like this one, so here are a few photos of it. They have interlocking pieces that allows you to rearrange the tiles in any configuration you like.
I know they're fairly old, because the pegs don't quite fit my modern figures correctly; they're the size of old-school pegs.
EDIT: I just identified them! They ARE from an old Star Wars set after all! Looks to be a combination of Hoth and Bespin displays. Its official name is the 'Vintage Star Wars Action Figure Display Arena 1981-1982 by Kenner'.
Here's the image of the full set!
For an added bonus, here's a couple of shots showing what it is I DO with the things: