túnel submarino

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

Fehmarnbelt Tunnel terá 18 km sob o Mar Báltico e reduzirá travessia entre Dinamarca e Alemanha para 7 minutos de trem.

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

Ilustração de túnel submarino ligando Espanha e Marrocos sob o Estreito de Gibraltar

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

Túnel Xiang’an liga a ilha de Xiamen ao continente pela primeira travessia rodoviária submarina da China continental, com 8,7 km de extensão e até 70 m abaixo do mar.

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

Rogfast será o maior túnel submarino do mundo e promete transformar a rodovia E39 e a infraestrutura europeia.

Construction

Rogfast: The Underwater Tunnel That Will Change Mobility in Norway

Sara Aquino 18/12/2025 at 10:20

Obra monumental na Noruega: túnel submarino de 26,5 km e 396 m de profundidade vai acabar com balsas e liberar exportações com tráfego de 6 mil veículos por dia.

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

O túnel submarino mais ambicioso do planeta: projeto de até 135 km sob o mar e estimativas acima de US$ 60 bilhões pode conectar duas regiões rivais na Ásia e reescrever a geopolítica da Ásia

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

Megatúnel, Trump, Rússia, Alasca, Túnel submarino

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

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.

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…

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.

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.

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

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

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

Rogfast: The Underwater Tunnel That Will Change Mobility in Norway

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

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

Trump Shows Interest In Building 112 km, $8 Billion Submarine Megatunnel Between Russia And Alaska, Using Elon Musk’s Technology

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

In the cold desert of Ladakh, where it hardly rains, engineer Sonam Wangchuk created the ice stupa, a tower that freezes winter water and stores it for irrigating crops in the spring, a simple engineering feat that mimics nature.

Libya built over 4,000 kilometers of underground pipelines to bring water from the Sahara to coastal cities in a project that the government itself called the Eighth Wonder of the World.

Chinese woman planted trees for decades while sand buried part of her house, received $5,000 from an American in 1999, and helped transform the desert into a forest of 8 million trees in China.

Almost 6,000 residents live concentrated along a single street nearly 9 km long in the interior of Poland. Houses form a continuous row, and behind them, narrow agricultural strips emerge, creating one of the most unusual rural patterns in Europe.

Desert sand, previously discarded for being too smooth for concrete, becomes an ecological brick in the United Arab Emirates, dispensing with Portland cement, curing at room temperature, and attempting to transform dunes useless for construction into raw material for a new arid engineering.

Described by astronauts as one of the most unlikely natural phenomena on Earth, the Okavango Delta spreads over up to 15,000 square kilometers in the middle of the desert and transforms Botswana into a living labyrinth of channels, islands, and flooded areas.

Hidden beneath a small entrance in Namibia’s underground, the largest underground lake in the world is the size of 2 football fields, 264 meters deep, and even has rare animals that survive without sunlight.