As the city’s longest metro line, spanning 17 kilometers between north and south Budapest, this subterranean path serves as a link between the Hungarian capital’s suburban areas (connecting the Újpest and the Kőbánya-Kispest terminuses) and the central zones. The renovation of the entire line was completed this year, 2023. Now it can provide uninterrupted rides underneath many of Budapest’s key neighborhoods and sights, including Árpád Bridge (connecting Óbuda with Margaret Island and Pest), Nyugati Railway Station, central Deák Ferenc Square (with connections to M1 and M2), the recently refurbished Kálvin Square, and the Népliget autobus terminus, a hub for numerous regional and international bus lines. The subway’s southern terminus – the Kőbánya-Kispest station – is the starting point of bus line 200E, transferring travelers to the Liszt Ferenc International Airport