Construction work for Porta Alpina, the underground train stop in the Gotthard base tunnel, with driving work truck and a red train of the Matterhorn-Gotthard-Bahn (background), Sedrun, Grisons, Switzerland

alpina bahn construction gotthard grisons matterhorn matterhorn gotthard bahn porta sedrun switzerland alpina background base construction driving gotthard graubunden grisons lorry matterhorn mgb porta railway red sbb sedrun station stop subterranean switzerland train truck tunnel underground work