Interesting facts With 123 km under the ocean, real-time seismic sensors, and travel at 250 km/h, China’s billion-dollar megaproject promises to transform 8-hour crossings into journeys of just 40 minutes without changing carriages. Alisson Ficher 06/05/2026 at 20:51
Construction Two giant machines, 14 meters long, move in opposite directions underwater — when they meet, China will have the largest underwater railway tunnel in the world… Douglas Avila 17/04/2026 at 18:04
Construction China digs a submarine tunnel for high-speed train and reaches 113 meters below the seabed, facing 13 layers of soil, fault zones, and intense pressure at the mouth of the Pearl River. Carla Teles 13/04/2026 at 13:04
Construction With 55 km over the sea, a cost of US$ 20 billion, and enough steel to build 60 Eiffel Towers, China’s largest project has connected Hong Kong, Zhuhai, and Macau in a colossal bridge that defies the logic of engineering. Ana Alice 03/04/2026 at 12:20
Science and Technology This Will Be The World’s Largest Undersea Tunnel: 18 km Under The Sea Connecting Denmark and Germany, 73,000-Ton Blocks Precisely Fitted, €7.5 Billion Investment, and Crossing Reduced to 7 Minutes Alisson Ficher 12/02/2026 at 17:48
Construction Company Confirms 38-Kilometer Undersea Tunnel Under the Strait of Gibraltar Is “Technically Feasible,” Anticipates Investment of R$ 53.3 Billion and Promises to Transform the Link Between Europe and Africa Felipe Alves da Silva 21/01/2026 at 20:13
Construction Dug 8.7 Km, With About 6 Km Under the Sea and Up to 70 M Below Sea Level, This Submarine Tunnel Was the First of Its Kind in Mainland China and Shortened a Crossing That Took More Than 1 Hour Alisson Ficher 31/12/2025 at 17:36
Construction Rogfast: The Underwater Tunnel That Will Change Mobility in Norway Sara Aquino 18/12/2025 at 10:20
Construction With 26.5 Kilometers In Length And 396 Meters Deep, Billion-Dollar Structure Will Eliminate Ferries, Transport 6,000 Vehicles Per Day, And Accelerate Exports In One Of The Most Challenging Regions On The Planet Alisson Ficher 17/11/2025 at 12:58
Construction The Most Ambitious Undersea Tunnel on the Planet: A Project of Up to 135 Km Under the Sea and Estimates Exceeding $60 Billion Could Connect Two Rival Regions in Asia and Rewrite Asia’s Geopolitics Valdemar Medeiros 31/10/2025 at 15:12
Construction Trump Shows Interest In Building 112 km, $8 Billion Submarine Megatunnel Between Russia And Alaska, Using Elon Musk’s Technology Romário Pereira de Carvalho 18/10/2025 at 08:20
Economy Billion-Dollar Submarine Tunnel Project Aims to Reduce Travel Time From 12 to 5 Hours With High-Speed Train at 250 Km/h, Potentially Benefiting 13 Million Passengers Each Year Alisson Ficher 06/06/2025 at 23:55