I remember a server back in the V8 days...
It was a challenge thing, and you'd have to walk down Trashman's World 5 or something like that and go through this wall using a secret passage. Then you go around the other end of the mountain, and there was an elevator. You get on the thing and it brought you up to the open plain ontop of the mountain where there was a teleport. After you went through, you appeared in this tiny room where you have to jump onto bricks that would fakekill in an instant and get up to the second level, then go through a door and down to a cave thing where you jump from rock to rock. After that, its a bounce room, and I never got farther than that.
tl;dr?