Athens Airport–Patras railway
The railway from Athens Airport to Patras is a double-track, standard-gauge railway line in Greece that, when completed, will connect Athens International Airport with Patras, the country's third-largest city. One of the largest railway projects of the last 30 years in Greece, its completion is of major significance for the infrastructure of the entire region of the northern Peloponnese.
Source: Wikipedia — Athens Airport–Patras railway (CC BY-SA 4.0)