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 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 (8 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 (13 C)
• Tunnels opened in the 20th century‎ (17 C)
• Tunnels opened in the 21st century‎ (9 C)