A couple of trips ago, we were driving through Switzerland to Italy and quite by chance (and a wrong turn !) found ourselves at a train station somewhere near Kloisters/Davos (I think). It was an open flat bed type of train and we had to drive onto it and stay in the car whilst it sped under the alps. The experience was quite surreal and it sounded like we were on a London underground train !
But we couldn't find it again on our next trips. Does anyone know where this is ??