For the midterm, I thought I'd make something that has a history of both entertainment and 3D confusion: a Labyrinth. Traditionally, this historic maze can be walked through from entry point to center and back again. The labyrinth has been a tool for group amusement and private meditation as well as an occasional escape from axe-weilding husbands writing their memoirs at snowy mountain retreats in the off season.
I haven't yet decided if the labyrinth will have a ceiling (to prevent our community members from simply flying to the center) or if it will be self-restraining, using walls in all directions along the X, Y, and Z axes.
However it develops (based on time and ability), I want to create an attractive concept around it and place a prize within it to make the venture worthwhile for visitors. I don't want to make it too hard. It should be fun with a few tricks inside (messaging, reflective surfaces, perhaps a secret passage or moving wall). I'll have to keep the scope within a realistic 2-week construction time.