Piața Unirii (Union Square) is a major metro station in Bucharest. It is located in the southern part of the city centre, in Unirii Square and it is one of the busiest stations of the Bucharest Metro. It is made up of two terminals, one on the M1 and M3 lines and another on the M2 line, linked by a passage. A McDonald's fast-food restaurant is located in the vestibule above the M2 line platform.