The conversion of the existing tunnels to metro tunnels ensured that there was minimal disruption on the surface.

Kralingse Zoom is an above-ground station and is located just to the east of the metro tunnel in which the trains cross the city center.

The UGT union transferred some vital industries to metro tunnels under the city which were not in use.

It is the only sane way to get to the base of the arch and is not linked to nearby metro tunnels.

A short leg of the metro tunnel also remains under the shopping center as reminiscence.

The killers in Golodkin's apartment, the would-be killers in the metro tunnel.

The game's locations reflect the dark atmosphere of real metro tunnels, with added survival horror elements.

Not all of the tunnel remained, but some sections were strengthened to allow the metro tunnels to be dug above.

Due to a metro tunnel running underneath the complex, advanced construction methods were required, allowing only a single underground floor to be built.

Excavating the metro tunnels under central Helsinki had begun in June 1971.