A long train tunnel goes through mountains. 

41 words
🖼️ Images & Media (9)
Map Gotthard-Basistunnel.png
Nordportal Gotthard-Basistunnel.jpg
NEAT GBT engl crop.png
Nrla scheme.png
Gotthard Basistunnel Portal Nord 2009-06-14.jpg
Gotthard 2016.jpg
SBB - Gotthard Base Tunnel (30346410681).jpg
Porta Alpina.jpg
Gottardo.jpg
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Content adapted from Wikipedia
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Readability: FK 11.5
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Vital Level 5