Looping (cylinder-shaped) world, possible?

I am trying to make a world(level) that loops itself, making player to walk infinitely.

I was thinking of level streaming, to achieve it by loading two continous levels at front of the player when he reaches the edge of each level. But the level streaming doesn’t seem to have positioning option, so that comes to the problem.
Can level streaming be positioned to specific location, or is there any other option to loop a world?

Ask me if this is hard to read, as English is not my first language.

I believe what you need is the World Browser which is supposed to come out of experimental in 4.3.

There are other workarounds, but it depends on your project.