Top 10 Longest Tunnels in the World of 2023

Tunnels are remarkable feats of engineering that connect distant locations, allowing us to traverse through mountains, under bodies of water, and across vast distances efficiently. In this article, we will delve into the world of tunnels and explore the top 10 longest tunnels in the world of 2023. These engineering marvels have revolutionized transportation and brought distant regions closer together. Let’s embark on a journey through these remarkable underground passages.

Longest Tunnels in the World

Tunnels have always fascinated us with their ability to pierce through the obstacles that nature presents. They provide crucial connections, facilitate trade and travel, and have become iconic landmarks in their own right. In this article, we will explore the top 10 longest tunnels in the world as of 2023. These tunnels showcase the ingenuity and expertise of engineers who have overcome formidable challenges to create these remarkable passages.

1. Gotthard Base Tunnel

Heading to Switzerland, we encounter the impressive Gotthard Base Tunnel, the longest railway tunnel in the world. Stretching approximately 57 kilometers (35.5 miles) beneath the Alps, this tunnel connects the Swiss towns of Erstfeld and Bodio. It revolutionized European transportation by providing a faster and more efficient link between northern and southern Europe.

Gotthard Base Tunnel

2. Seikan Tunnel

Located in Japan, the Seikan Tunnel holds the title of the world’s longest tunnel for a single-track railway. This undersea marvel connects the islands of Honshu and Hokkaido, stretching approximately 53.85 kilometers (33.49 miles) beneath the Tsugaru Strait. The Seikan Tunnel is a testament to Japanese engineering excellence and withstands the challenges of earthquakes and typhoons.

Seikan Tunnel

3. Channel Tunnel

The Channel Tunnel, also known as the Eurotunnel, links the United Kingdom and France beneath the English Channel. With a total length of about 50.45 kilometers (31.35 miles), it connects Folkestone in England and Coquelles near Calais in France. This remarkable tunnel allows for high-speed train travel, creating a vital transportation link between the two countries.

Channel Tunnel

4. New Guanjiao Tunnel

In China, we find the New Guanjiao Tunnel, an integral part of the Lanzhou-Xinjiang High-Speed Railway. Extending approximately 32.645 kilometers (20.3 miles), this tunnel is located in the Qilian Mountains. It plays a crucial role in connecting the cities of Lanzhou and Urumqi, significantly reducing travel time and enhancing transportation efficiency.

New Guanjiao Tunnel

5. Guadarrama Tunnel

Situated in Spain, the Guadarrama Tunnel forms a crucial section of the high-speed rail line connecting Madrid and Valladolid. This tunnel spans approximately 28.4 kilometers (17.6 miles) beneath the Guadarrama mountain range. It showcases Spain’s commitment to modern transportation infrastructure and allows for faster and more convenient travel between the two cities.

Guadarrama Tunnel

6. Laerdal Tunnel

Venturing to Norway, we encounter the mesmerizing Laerdal Tunnel, the longest road tunnel in the world. Stretching approximately 24.5 kilometers (15.23 miles), this tunnel is part of the European Route E16 and runs between Laerdal and Aurland. Its innovative lighting design creates an otherworldly experience for drivers passing through this subterranean marvel.

Laerdal Tunnel

7. SMART Tunnel

Malaysia’s SMART Tunnel, an acronym for Stormwater Management and Road Tunnel, serves a dual purpose. This tunnel spans approximately 9.7 kilometers (6 miles) beneath Kuala Lumpur, providing a vital traffic link and serving as a stormwater reservoir during heavy rains. The SMART Tunnel showcases Malaysia’s innovative approach to urban infrastructure and flood management.

SMART Tunnel

8. Anton Anderson Memorial Tunnel

In Alaska, the Anton Anderson Memorial Tunnel, often referred to as the Whittier Tunnel, is a remarkable transportation route. Spanning approximately 4.5 kilometers (2.88 miles), this tunnel provides access to the isolated town of Whittier. It accommodates both railway and vehicle traffic, and its unique operational schedule ensures efficient transportation in this remote region.

Anton Anderson Memorial Tunnel

9. Eisenhower Tunnel

The Eisenhower Tunnel, situated in the Rocky Mountains of Colorado, is a vital passage along Interstate 70. With a length of approximately 3.2 kilometers (1.99 miles), it cuts through the Continental Divide and allows for safe and convenient travel between eastern and western Colorado. This tunnel is a testament to human engineering in challenging mountainous terrains.

Eisenhower Tunnel

10. Zion-Mount Carmel Tunnel

Our final tunnel takes us to Utah’s Zion National Park, where the Zion-Mount Carmel Tunnel offers a breathtaking passage through the sandstone cliffs. With a length of approximately 1.9 kilometers (1.1 miles), this tunnel is an engineering marvel that allows visitors to explore the wonders of the park. Its construction involved carving through solid rock, showcasing human ingenuity in harmony with nature.

Zion-Mount Carmel Tunnel


Tunnels have revolutionized transportation and connectivity, enabling us to overcome natural barriers and bring distant regions together. The top 10 longest tunnels in the world, as explored in this article, represent remarkable achievements in engineering and human ingenuity. These tunnels have transformed travel and trade, providing efficient links between nations and enhancing global connectivity.

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