This is how Cal y Canto station (Santiago 🇨🇱) will look in 2032 when it will start serving four lines (L2, L3, L7, L9).

Everyone is going to be in separate stations but connected through tunnels. However, due to the size of upcoming the L7 station, the later will likely become a hub.

PS: There was a design competition to renewal the whole area but it was thought for a L2+L3 stations scenario. Still, the area will need a major improvement anyway.

PS2: Next to the L2 station, there's the train station-turned-cultural center Mapocho station and maybe it could roll back its function.