Running between Pest’s Örs Vezér Square and Buda’s Déli Railway Station, the red line was introduced as the city’s first modern underground, linking Budapest’s eastern and western sides. The entire line received a thorough renovation between 2004 and 2008, while the old metro cars were replaced by its modern-day vehicles in 2012. Those who take this underground enjoy smooth and speedy rides amid air-conditioned settings, running under such key locales as the Keleti Railway Station (a major hub for international trains), Kossuth Square (towered over by the imposing Parliament), or Batthyány Square (a main transport junction on the Buda side), while at its Deák Ferenc Square station, passengers can change to Metro line 1 or 3, as this is the junction of those three lines.