Someone was asking about the northernmost cache in the world in national chat a few hours ago, and after some searching, we think we have found it.
As North As It Gets! (GC5803) by Iceshelf 2002 Research Team (3.5/5)
This cache is 519.663 mi from the North Pole. Amazing this was placed in 2002 and has had 13 finders! Anyone up for a ride?
Be sure to look at the cache pictures!