The "Carrileiros de Foula" Railway Park in the city of Ourense in Galicia (NW of Spain), has a 5 inches wide track, which runs along 470m, including two stations, a viaduct, a pair of tunnels, an interchanger and a lot of true railway items.

Children and grown ups can even have a ride in the model trains... and then you can't say which of them are the happiest.