View of Escalator of the New Metro Line 4 in Budapest,Hungary.The modern design and impressive decoration feature is characterized by all the stations Stock Photo - Alamy
M4 Metro line 4 station, Kalvin ter, central Budapest, Hungary, Europe Stock Photo - Alamy
File:Line 4 Budapest Metro.JPG - Wikimedia Commons
File:Budapest, metró 4, Rákóczi tér, 4.jpg - Wikimedia Commons