A lot of petrolheads enjoy taking their pride and joy to the event with them, which is why I've always reckoned it's worth having a nose around the car park before you head home to see if there's anything special hiding among the Astras and Qashqais.
In the case of this year's Donington Historic Festival the public car park proved to be particularly prolific, with the fantastically rare Porsche 911 Speedster you see above giving an idea of just some of the surprises in store.
Here's just a few of the automotive treats that were in store...
Traditionalist Morgan or exuberant Ferrari F355 - which would you pick for a blast through the countryside?
A sports car classic in Italian racing red takes centre stage in Donington's car park. Oh, and there's a Ferrari Dino too.
No prizes for guessing which one I'd pick...
Rover 214SEi owned by Yours Truly, Lotus Elise and Austin Healey Sprite pose for the camera.
How many car parks have you spotted an Alfa Romeo SZ in lately? Liking the Astra GTE alongside it too - a surprisingly rare sight on British roads these days!
Two very different Sixties classics - a Citroen DS21 and an MGB Roadster - add a touch of style to the car park.
Oh-so-Seventies shade of gold seems to suit this Series 3 Jaguar XJ6 perfectly.
Porsche 911 GT3 wins our approval. Questionable registration plate doesn't.
Ford Fiesta RS Turbo - when was the last time you saw one?
Check out Life On Cars later this week for some of the highlights from inside this year's Donington Historic Festival.