Yesterday I railroad viaduct in Texas caught fire. The viaduct was built in 1910, and like most railroad viaducts constructed during that time, made out of wood and creosoted cross ties. Creosote of course makes for easy burning and it really does not take much to light it.
The attending fire departments decided that it was just too dangerous to get close to the burning viaduct and decided to let it burn itself out. With spectacular results, as the video shows:
No word on what caused the fire. The damage is estimated to be around 10 million dollars.