>Metre-gauge tram and driving trailer R12 at Arc de Triomf (Trionfo), Barcelona Oh, right, the coupled pairs of this model consisted always of a motor car, and a driving trailer, so they worked as bi-directional units. The others had a turning loop at the same terminal as the previous pic.
The eponymous triumphal arch is to the right of Dewi Williams taking the pic.
https://www.google.es/maps/@41.3914376,2.180331,3a,75y,38.1h,87.33t/data=!3m6!1e1!3m4!1ssmHOC6287FJBGptSeOYwyA!2e0!7i13312!8i6656