Article Detail Longest rail tunnel in the world ? Answer: Seikan Tunnel (Japan - 53.9 Km) Similar Questions : 1. Which is longest river in world ? Answer: Nile, Africa 2. Which is largest continent ? Answer: Asia 3. Which is Highest Award in India ? Answer: Bharat Ratna 4. Which is the longest Platform ? Answer: Gorakhpur railway station, Uttar Pradesh, India (1355.40 meters) 5. Which is the longest River in the World ? Answer: Nile 6. Which is largest Delta of India ? Answer: Sundarban (W. Bengal) 7. Which is Largest library in the world ? Answer: United State Library of Congress, Washington D.C. Read more from - Longest and Largest