Article Detail Longest rail tunnel in the world ? Answer: Seikan Tunnel (Japan - 53.9 Km) Similar Questions : 1. Which is largest continent ? Answer: Asia 2. Which is the longest Platform ? Answer: Gorakhpur railway station, Uttar Pradesh, India (1355.40 meters) 3. Which is the Densest populated State of India ? Answer: West Bengal 4. Which is largest continent ? Answer: Asia 5. Which is the biggest museum in the world ? Answer: British Museum, London 6. Which is the Largest lake of the world ? Answer: Caspian Sea (371,000 sq km) 7. Which is smallest and largest bird ? Answer: Smallest Bird is Humming Bird and Largest bird is Ostrich Read more from - Longest and Largest