What was the rarest, most unusual or otherwise most notable car you've ever seen?

As the title says.

Here's my #1 find of all time - a Rimac Concept One.

It's the only hypercar I've ever seen, and one of the rarest of its kind, having only been made in eight units. This exact one wears the Formula E race director livery, and likely is the actual car used in motorsport.

 

I'm not into supercars and exotics, but my most notable car would be these:

Zastava Florida In 1.4 HDI, with PSA 1.4 HDI 68 HP diesel engine. Made in only 18 examples.

Yugo Florida 1.4 EFI Automatic, model intended for US market, with 1.4 fuel injected engine with 71 HP, power windows, aircon and 3 speed automatic gearbox. This is the only example ever built.

 

Was it an in-house Zastava design, or from an external supplier?

 

Renault 19's.

 

I'd say the most rarest would be an vintage car at Newport that I have yet to identify and only have crappy iPod photos of it, second to a Bugatti replica I found at Boston before attending the PAX East 2019 convention.

One notable car that I did spot in my old hometown would be a pair of FBs, one as a shell and another that seemed already refurbished.

 

In 2013, I got to see a concept form of the Acura NSX. It looks a hell of a lot nicer in person than in pictures, I can say that much.