Other forms: wreckages
What's left behind after a destructive accident or disaster is called wreckage. The day after tornadoes sweep through a town, its inhabitants might search the wreckage of their houses for mementoes and valuables.
When a bomb goes off, a city floods, or a house burns down, mangled pieces of buildings and cars often remain — wreckage that's a reminder of the catastrophe. After the Titanic hit an iceberg and sank, the wreckage sat on the ocean floor for decades before divers found it. Wreckage comes from wreck, originally "goods washed ashore after a shipwreck."