This is the bonus cache associated with my new Adventure Lab, "The Honeybourne Line". You can complete the Adventure and unlock the final coordinates to this cache via the Adventure Labs app.
The final coordinates are:
N51 54.HON
W2 4.9EY
Nqiragher: nyy gur pyhrf ner jbeqf gung pna sbyybj gur jbeq 'ubarl'
Pnpur: 175