What caused a Baltimore street to collapse onto a railroad? How did engineers fix London’s wobbly Millennium Footbridge? Experts and witnesses analyse what happened.

In San Francisco, California, residents in a luxury apartment block noticed their floor wasn’t flat. Experts and witnesses analyse what happened to the building.

Once considered the eighth Wonder of the World, the Kinzua Bridge was the longest railway bridge in the world. But, a freak tornado destroyed it – why did it fall?

What epic engineering error caused flooding in Chicago? Plus, on the east coast of the UK, residents seek a solution for their houses that are falling onto the beach.

What architectural error ruined a Paris landmark? Plus, in Dallas, Texas, soaring temperatures and sunrays blaze and reflect into high-rise apartment building.

What Scottish landmark has a limited timespan with risky consequences? Also, in Liverpool on New Year’s Eve a huge fire broke out in a carpark – what happened?