Inside the Inferno —Matthew Bonner, Imperial College London

Photo taken from inside the world's largest indoor fire experiment, performed by Imperial Hazelab and collaborators in May 2019. The fire front spreads along unburned wood in the left of the photo (the leading end) and fully develops into large blaze on the right (the trailing end).

https://fluids.ac.uk/files/08_Matthew_Bonner_Matt_Bonner_and_Eirik_Christensen_Inside_the_Inferno.1576080227.jpg