The Melbourne City Loop is a train loop where Melbourne, Victoria's railway lines meet. The loop has four train tunnels and the stations are under the ground. The three stations are Flagstaff, Melbourne Central and Parliament. It links up to Melbourne's two busiest stations, Flinders Street and Southern Cross. The Metro Tunnel is another train tunnel that runs alongside the City Loop. The Metro Tunnel provides links to the City Loop at Melbourne Central and Flinders Street stations.
The City Loop has three underground stations. There are no platform screen doors. In order to not fall down the tracks, passengers have to stand behind the line. The stations opened in stages from the 1980s.
Parliament Station is located in the east of the Melbourne CBD. Its name is a reference to the nearby Parliament House. It is the deepest station in the loop with the longest escalators of the three.
Melbourne Central station is located almost directly over State Library station and passengers can walk between the two stations without touching on and off their Myki. It is named after the nearby Melbourne Central Shopping Centre.
Flagstaff station is located northeast in the Melbourne CBD. It is named after the nearby Flagstaff Gardens. Interestingly, this station used to close every Sunday until the mid 2010s.