To find this bonus cache, you first need to complete the nearby Adventure Lab.
https://adventurelab.page.link/EzAb
Once you have collected all five letters from the Lab locations, order them alphabetically and enter them in certitude for the final location.
![Click to see the list of solvers](https://www.certitudes.org/logo?wp=GC9YWWD)
You can validate your puzzle solution with certitude.