How has Spa's daunting, uphill Eau Rouge complex changed over the years? Watch these onboards and you'll see.

These shots cover every (race) year 1991-2013, and you get a great a sense of how F1 cars have tackled the turn, and what kind of challenge the turns present to the drivers.

Some complain that the armco is too far back compared to its older permutations, and that there's too much runoff. But I'm not sure I agree with that assessment.

(Hat tip to Sam Smith!)