Bucuresti, Romania
In the '80s, in the Youth's Park (Parcul Tineretului), the Romanian Communist leader, Nicolae Ceausescu, open the first "amusement park" in Bucharest at that time. All the equippments remained in service (many in very poor condition) untill 2012, when all was scrapped. This section of the park, called "The children's town" (Oraselul Copiilor) also had 1.8 km of narrow gauge (760 mm) system with one yard, one station and one stopping point. The rolling stock was formed by 2 locomotives and 3 cars. In 1992, the park was rented by a private company that, since 1993, hasn't paid the rent but won the railway in court a few years later (!). Between 2002 and 2006, the small railway was closed and the station was demolished. Between 2006 and 2011, the trains ran again in some week-ends, but the infrastructure was in poor condition, due to lack of maintence and thefts. In 2011, the mayor of the 4th sector of Bucharest started the ,,modernisation" of the park, so the private company scrapped all its equipments (including the trains and rails) and left. Now all is history.
The "locomotives" were built by I.T.B.'s Central Workshops (now RATB-URAC = Uzina de Reparatii ,,Atelierele Centrale", that builds trams and repair vehicles for RATB). They have 2 axles and the diesel motor is taken from a tractor. The design of the locomotives is close to that of a steam locomotive. The only working locomotive left (the other one was used for spare parts for many years) was painted like a version of Thomas The Tank Engine (the other locomotive was painted in a simillar livery, but blue).

More pictures & info about this line.
Photo by Dr2005 - transportbucuresti.trei(a)gmail.com, www.transport-in-comun.ro/trenuri.