How the world's longest underwater tunnel was built - Alex Gendler

Undersea Rail Tunnel Between Japanese Islands: Seikan Tunnel Explained

How the world’s largest underwater tunnel is being built | BBC News

Unbelievable! The sea is full of water, how is the undersea tunnel built?

The world’s longest undersea high-speed railway #tunnel is under construction in #China #fyp #fypシ

The Channel Tunnel: Building the World's Longest Undersea Link

中国がわずか110日間で世界最大の海底トンネルを建設した方法

China Leaves American President Shocked, Builds The Longest Undersea Tunnel In The World

The Impossible Construction of World's Longest Undersea Tunnel

How Do They Build Underwater Tunnels?

Seikan Tunnel – The World's Longest Undersea Tunnel

Japanese engineers' underwater tunnel project shocked billions of people. Unbelievable project!

Who designed this underwater road? That's so talented!#viralshort #subscribe

"China Built a Tunnel Underwater — Here’s Why It’s Amazing"

12 World's Most Incredible Undersea Tunnels

Channel Tunnel !

World’s Highest Bridge Made By China 😱 !!!

Mega Tunnelling Boring Machine (TBM) at Work #shorts

Deepest Road Tunnel in the World

How Tunnel Boring Machines Get Out 🤨