The Safor Greenway Nature Trail partly follows the southern end of the former Carcaixent–Dénia railway line. This was a pioneering line —the oldest narrow-gauge railway in Spain— which remained in operation for 90 years.

Its first section, between Carcaixent and Gandía, opened in 1864 as a horse-drawn tramway, with the unusual gauge of 1,380 mm. In 1882 the line was acquired by the Ferrocarril de Almansa a Valencia y Tarragona (later absorbed into Norte), which extended it all the way to Dénia, converting it into a conventional steam railway and adopting the more common metre gauge.

With a clear agricultural purpose, its main role was to carry citrus fruit from the orchards to the port of Dénia and, via Carcaixent, to the rest of Spain. When Norte was nationalised and absorbed into Renfe in 1941, the line was transferred to the other state-owned railway company, Explotación de Ferrocarriles por el Estado, which in 1964 was reorganised as FEVE.

In 1969, the local railway network was reshaped: the section from Carcaixent to Tavernes was closed, while the remaining stretch to Gandía was converted to Iberian gauge and linked to the line coming from Silla and Cullera. The new trains reached Gandía in 1972, but the planned extension beyond the city was never built.  This final section to Dénia remained in service for a couple of more years, until 1974, in the hope that its route would serve the extension of commuter trains to Dénia. But the project was never carried out. Since then, there have been repeated attempts to revive the railway between Gandía and Dénia —initiatives that continue even today— but so far only cyclists retrace the path of this once-rural train.