Category:Tunnels by century of opening

• Tunnels in Austria by century of opening (5 C)
• Tunnels in Canada by century of opening (2 C)
• Tunnels in Germany by century of opening (8 C)
• Tunnels in Italy by century of opening (4 C)
• Tunnels in Romania by century of opening (2 C)
• Tunnels in Switzerland by century of opening (4 C)
• Tunnels in the United States by century of opening (5 C)

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• Rail tunnels by century of opening (9 C)
• Road tunnels by century of opening (6 C)

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• Tunnels opened in the 1st century (1 C)
• Tunnels opened in the 8th century (1 C)
• Tunnels opened in the 12th century (1 C)
• Tunnels opened in the 15th century (3 C)
• Tunnels opened in the 19th century (15 C)
• Tunnels opened in the 20th century (19 C)
• Tunnels opened in the 21st century (10 C)