Saw a lot of rare exotic cars, just this year i've saw:
-An Audi R8
-2 Aston Martin DB9's, DB7 (which i got to sit in) and a V8 Vantage
-A Ferrari F430, 599 and a 360 Spyder
-2 RR Phantoms
-A Porsche 911 GT3 (see a lot of Boxsters and Caymens so i dont really count those as rare or exotic anymore)
-A Chevy Bel-Air, no idea what year though, looked like a later one.
-A Maserati Spyder and a Quatroporte
-Chevrolet Corvette C6
-A replica of an AC Cobra 427
-Lamborghini Diablo (literally stared at this for an hour lol)
-Lotus Esprit and an Exige. Also saw an Elan but it was in pretty bad shape

-Quite a few Hummer H2's, ironically, they were all in petrol stations

-TVR Cerbera Speed 6, deafened everyone in the tunnel, sounded like a missile taking off into space, also saw a Chimaera the same day.
-A convoy of 5 Caterhams, was really fun to watch them all blast up the motorway, think it was a Car Club meeting or something.
Passed a few exotic car dealers too, inside were Ferrari's, Lambo's, hell, even a Bugatti EB110 was in one. I wasn't even allowed inside though, don't blame them really lol
And a lot of other, not exotic but pretty rare cars like a few Evo X's, RX7's and a Nissan Silvia S15.