Belgian Grand Prix: What makes Spa-Francorchamps so special?

Ahead of this weekend's Belgian Grand Prix, BBC Sport's Tom Bowker explains what makes the Spa-Francorchamps circuit so special.

The 7.004m circuit, set in the spectacular surroundings of Belgium's Ardennes forest, is a favourite of both drivers and fans due to the challenging nature of it's corners and drama caused by the unpredictable weather.

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