The Teynham 10 is a walk of 5 miles and should take around 2-3 hours depending on find speed. Number 13 should be given the maximum level of stealth and is the meanest seeing as it's no 13!
Puzzle #10 was a Kakuro puzzle, which can be found here...
Puzzle #11 was a cipher puzzle, which can be found here...
You will need to solve and visit those caches to collect the bonus numbers to solve the following puzzle for this physical cache. Use the bonus numbers from the caches, not any numbers from the two puzzles.
When at GZ please be careful and aware of your surroundings.
The cache can be found at...
N 51 (A) (C) . (E+F) (B-E) (F-A)
E 000 (A+E) (B) . (F) (C+D) (C-F-E)
If you want to double check the answer...

Congrats to SAS&A1 on the FTF of the entire series, and special thanks to them also for all their help in the snagging of these puzzles.