the Otago Excursion Train Trust and two jointly by both shareholding parties. On 1 December 2017, the company legally changed its name to Dunedin Railways Limited. Taieri Gorge Limited The Taieri Gorge Limited is New Zealand's longest tourist railway and stretches along the former Otago Central Railway from the 4 km peg on the Taieri Branch, 18 km west of Dunedin, to Middlemarch, a distance of . Between Dunedin and the start of the line, its trains operate on KiwiRail's Main South Line via a running rights agreement. The line travels along the banks of the Taieri River, through numerous tunnels and along the Taieri Gorge to the Strath Taieri. It crosses a dozen viaducts and passes through ten tunnels. At Wingatui railway station, the original building and signal box from 1914 has been restored. After the line passes through the long Salisbury Tunnel, the longest on the line, it crosses Mullocky Gully over the long Wingatui Viaduct, the largest wrought iron structure in New Zealand since it was built in 1887. The 47 m tall viaduct's riveted truss structure rests on seven concrete and masonry piers. Shortly after the Wingatui Viaduct, the route emerges from Mullocky Gully to join Taieri Gorge, and from then on follows that gorge above Taieri River to just east of Pukerangi. On the way the line passes former stations Parera, Mount Allen, Little Mount Allen, and Christmas Creek, crossing two curved viaducts at the latter two locations. Hindon, still operating as a crossing station, is typically one of the stopping points on the trip. Just before the station, the railway tracks share a combined road-rail bridge with Hindon Road. Another stopping point for photo opportunities is the Deep Stream viaduct. Here the line slowly starts to climb higher and out of the gorge, passing over the Flat Stream viaduct, and "The Notches", a section of short bridges and cuttings through several rocky outcrops, on its way to Pukerangi. Between Pukerangi and Middlemarch, the railway only once more comes close to the Taieri River, where it crosses Sutton Creek over another combined road-rail bridge. The train operates daily to Pukerangi and on summer Fridays and Sundays to Middlemarch. Seasider and Dunedin Silver Fern Dunedin Railways also operates the Seasider tourist train along the coast to Palmerston, north of Dunedin, with bus connections to the Taieri Gorge Limited at Middlemarch. Following the withdrawal of the Southerner