So here is how it works:
- Start at any known place, but places where usually a lot of avatars are are helpful
- Open the profile of the nearest avatar to you
- Go to her/his "Picks" section, and teleport to the first pick
- Explore the place you TPed to - once you have seen enough, go to step two again
But still it's a pretty funny way to explore the grid, and I found some nice places that way.