At the posted coordinates there is nothing but water. Don't go there.
This is a bonus cache for the Adventure Lab Cache (ALC) "Drottningholm - The Home of Monarchs".
To solve this cache you first need to complete the ALC to get the information necessary for this cache.
Use the clues obtained from the ALC to solve the crossword puzzle below, then form a word using the gray letters and enter this word in the certitude to obtain the final coordinates for the cache.
Good luck!
220204: Coordinates for the final changed. If you obtained the final coords before this date, please recheck the answer.
You can validate your puzzle solution with certitude.