I've definitely seen Camelot from the motorway many times, but have never been, hope to get there this year. I've driven past a few small parks in Wales, which I didn't visit because they all looked closed at the time and also Brean Leisure Park, which I'm visiting this year. I love driving past parks when in the car though, even though I have visited all these parks; I remember seeing Silver Star from miles away and it looked awesome. Other notable mentions are SFMM when driving from San Francisco to LA; Knott's looked great, could see Xcelerator from a while away; SeaWorld Orlando especially Kraken from the road.