Another great procrastination tool. I really need to start a site just for that subject.
I tried the 'all roads' after xkcd published his comic (read the mouse-over). At that point I found one heading that lead to a loop. It seems to have been fixed now. I read at Measure of Doubt that Wikipedia was working away to fix things after the comic was so popular.
Of course, the first thing I entered was 'cats'. And then 'chocolate'. Their paths meet in Mathematics.
And speaking of cats - I, too, love cats. But rainbows? Really?