Glass train

The Baureihe ET 91 was a series of electric multiple units built for the Deutsche Reichsbahn-Gesellschaft of Germany. The units colloquially known as Gläserner Zug (Glass Train) were equipped with large panorama windows, providing an excellent outside view to the passengers. The vehicles were used for recreational trips only, especially in southern Germany and Austria. (From Wikipedia)

Der gläserne Zug

Der gläserne Zug