I don't remember but it was really sad. The yard was closed in 1975. Of course it didn't match any rules regarding environment. It was closed and quiet. Due to the climate the cars were really rustet in pieces. The official government made him clear it even though it was considerd being art. So finally the cars got auctioned off.
All of this is nothing unusual for you in the US but as we have always been more regulatet this yard was kinda like heaven for us. I visitet it, too.
He had about 150 american cars inside, all of them were sold new in switzerland back in the day