INSIDE A FIRELOG
In this intriguing close up photograph taken by Redditor Cyko28, we see the red-hot inside of a firelog as it burns away the wood from the inside out.
A firelog is like a big wooden candle that burns from the middle of the log outwards. This is done by drilling a hole down the middle of the log and another hole into the side of the log and then coating the inside with wax. You can find a great how-to video here.
It’s a fun homemade project that creates a neat little portable fire that can be moved around as the outside of the log is cool enough to pick up.