A stadium on the brink of collapse, an upside-down bridge, and a massive subway project in crisis are engineering catastrophes in need of repair, and experts use cutting-edge technology to reveal if they can be fixed.

An airport that's sinking into the sea, a strange tower that goes wrong, and a dangerous bridge in Venice are engineering catastrophes in need of repair, and experts use cutting-edge technology to reveal if they can be fixed.

A city with hundreds of leaning buildings, the world's scariest airport and the world's biggest sewage pipe harbor engineering disasters in need of repair; experts use cutting-edge technology to reveal if they can be fixed.

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 sinkhole, a multi-million dollar road to nowhere, and a wind turbine 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.