India's Atal Tunnel is now the World's Longest Highway Tunnel above 10,000 ft! | Times of India Travel
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PM Narendra Modi inaugurates Atal Tunnel: Key facts about the world's longest road tunnel - In honour of Atal Bihari Vajpayee | The Economic Times
Gotthard tunnel: World's longest and deepest rail tunnel opens in Switzerland - BBC News
Lærdalstunnelen - Worlds longest road tunnel | Nature Attractions | Lærdal | Norway
World's Longest Tunnel - How It Was Built - Full Documentary - YouTube
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