The longest road tunnels in the world

The Ryfylke Tunnel is the longest undersea road tunnel in the world at present and stretches some 8.98 miles between ...
Practical Engineering on MSN

Underground pressure is brutal - and tunnels still survive

Underground, every inch of earth wants to cave in. But engineers fight back with geometry, support systems, and timing. This is how tunnels stay up — and what happens when they don’t.
CNN

Norway is building the world’s longest, deepest undersea road tunnel

The world’s longest and deepest undersea road tunnel is being built in Norway, intended to cut travel time between major cities and become part of a ferry-free highway along its western coast. The ...
CNN

A partial tunnel collapse in Los Angeles left dozens of workers trapped about 400 feet below ground. They all survived

Thirty-one men working on a tunnel about 400 feet beneath the ground in Los Angeles were operating a machine to carve through the earth. Without warning, a portion of the tunnel collapsed around them ...
Futurism

Scientists Confirm Massive Underground Tunnels on Venus

We’ve known for quite some time that molten rock gouged enormous tunnels into the surface of the Earth, the Moon, and Mars. In fact, scientists have proposed that the vast lava tubes under the surface ...