What Are the Worst Forest Fires in History?

Many of the worst forest fires in history are measured in terms of acres destruction and fatality rather than in time. The next area to think about though would be, of course, human sustained fires. A flame that's kept and fed more or less like a pet is called an eternal flame. It was shocked to discover how many monuments there are that have so called eternal flames on them. I don't know what you should call it - maybe it's just a morbid brain but it seems like calling it 'an eternal flame' isn't quite right.