An everlasting bonfire is located in the Tower of Voices in Prifddinas, on the north-west balcony. The bonfire can be used for training Firemaking, as well as training Cooking. The bonfire can be configured with the Configure option to have it's left-click/short-tap option be to add logs to the fire, or to cook on it.
This information has been compiled as part of the update history project. Some updates may not be included - see here for how to help out!
- hotfix 8 April 2019:
- The Prifddinas bonfire once again calculates the correct amount of XP to give when more than one log is used up, such as when the pyromaniac perk triggers. 
- patch 18 July 2016 (Update):
- Bonfires in Prifddinas now have a cook option.
- ninja 5 May 2015 (Update):
- The Prifddinas bonfires will now grant the Soul Reaper bonus duration for the increased maximum health boost.
- patch 10 November 2014 (Update):
- Fixed an issue with being unable to locate a valid spot when adding logs to the permanent bonfire in Prifddinas.
- ^ Jagex. Mod Shauny's Twitter account. 8 April 2019. (Archived from the original on 8 April 2019.) Mod Shauny: "The Prifddinas bonfire once again calculates the correct amount of XP to give when more than one log is used up, such as when the pyromaniac perk triggers."