Say you're floating in an empty void with a light source. The space you are in has a positive curvature, so going forwards will bring you back to the place you started after about 20 meters. What do you see?
Bonus question: Is this similar to being on the surface of a hyper-sphere? If you're on the edge of a circle, there is one dimension to move along and eventually you will come back to where you came from. If you're on the surface of a sphere there are two dimensions to move along, and if you go in one direction for long enough you'll come back to the start as well. I'm thinking there should be an analogue for a 4D-sphere where you can move along 3 dimensions.