I'm waiting for the release of Larry Niven's ring world.
(Not the lame ring-world they have now)
However, the land area is beyond huge - consider a circle with diameter of 186 million miles, let's see, times pi, that would be close to 585 million miles in circumference. Doesn't have to be that wide, but if we assume a rough scale of 1 square = 10 miles, that would make our ring-world 58.5 million squares "long" before it meets itself.
Just for fun, back in Civ2, I created a map using the longest map with a narrow width. What I got was a grid that was something like 200x10. Sure made things interesting!
I guess the next level beyond Ring World is a Dyson Sphere...
- Sligo