Everything from funky to functional, but mostly funky.

Mazda RX-500 concept

What it is: A 247-hp, 1,873-lb. rotary-powered supercar concept that originally debuted at the 1970 Tokyo auto show.

What we like about it: What's not to like?

Coolest feature: Forward-swinging butterfly-wing passenger doors and gullwing engine-access doors on that breadvan booty.

See more photos of this vehicle