Well so car number #11 is a Ford V8 Cabriolet by Neuss....it should match with location number #1 I think,Neuss,Germany.
Car number #15 should match with the #15 - It“s the observatory in the Tatra Mountains..it“s a project or a prototype car made by Tatra. Can“t find it..
(If the last one is right,award pnegyesi for it as I would never find this observatory)