rail tunnel view. Annotated "Elect train emerging from Otira Tunnel S Is NZ. The tunnel which is 5 miles long is between Otira and Arthur's Gap in the Southern Alps. In passing thru the tunnel the train climbs about 1200 to 2400 ft above sea level. It is the longest tunnel in the British Empire and the 6th longest in the world"
rail Train. Annotated "Elect train leaving Arthur's Pass for Otira"