A skyscraper so dangerous that it can melt cars, a bridge fiasco, and a stadium roof on the brink of disaster are engineering catastrophes in need of repair, and experts use cutting-edge technology to reveal if they can be fixed.

A giant tunnel boring machine stuck underground, a village sinking into a mountain, and massive holes that could derail a train are engineering catastrophes in need of repair, and experts use cutting-edge technology to reveal if they can be fixed.