Koralm Tunnel country Austria
The Koralm Tunnel is a railway tunnel that is under construction in Austria under the Koralpe mountain range. It forms one section of the 130 km (81 mi)-long Koralm Railway which will link Graz with Klagenfurt.
Once complete, the Koralm Tunnel shall be Austria's longest railway tunnel, possessing a length of 32.9 km (20.4 mi) while running at depths of up to 1,250 m (4,100 ft) below ground. It comprises a pair of tunnels running in parallel, each capable of carrying a single railway track, which will be linked together every 500 metres (1,600 ft).
Nation State Land Territory