Collocations for tunnel - noun

long, short | narrow, wide | dark | subterranean, underground | connecting, entrance, escape, service | rail, railway, road | wind
a wind tunnel for aerodynamic experiments

go through, use | disappear into, enter, go into
The train disappeared into a tunnel.

come out of | bore, build, construct, dig, excavate
They''ve built a new tunnel through the mountain. | The initial section of tunnel had to be dug by hand.

run
A service tunnel runs between the two buildings.

mouth, roof, wall

through a/the ~

a labyrinth/maze/network/system of tunnels
The badger sett had twelve entrances to what must have been a labyrinth of tunnels.