And now for something different: A letterbox hybrid geocache.
Letterboxing - a close relative to geocaching - has been around much longer than the GPS. The origin of letterboxing can be traced to Dartmoor, Devon, England in 1854. A well known Dartmoor guide, James Perrott, placed a bottle for visiting cards at Cranmere Pool on the northern moor in 1854. From this, hikers on the moors began to leave a letter or postcard inside a box along the trail (sometimes addressed to themselves, sometimes a friend or relative)—hence the name "letterboxing". The next person to discover the site would collect the postcards and post them.
The pic below shows how the original Cranmere Pool letterbox looked like up until 2014:
The door was re-painted in 2014:
The request, on the inside of the door, to leave the letterbox's stamp behind after recording your find.
Interest in letterboxing in North America is generally considered to have started with a feature article in the Smithsonian Magazine in April 1998. As a hobby, it has evolved from the traditional Dartmoor letterboxing in that letters are not commonly used now, and the directions to the letterboxes are, like geocaching, posted online. The two main differences between traditional letterboxing and geocaching are:
1) Letterboxing does not traditionally use coordinates, yet gives searchers a starting point and a set of directions on how to get to the hidden letterbox "cache".
2) A letterbox always contains a stamp, stamp pad and visitors book.
So - enough of the history lesson - what about this cache???
FINDING the "STAMP A SMILE AT STAVANGER DRIVE" CACHE:
True to the word "hybrid", you have two options to find this cache. You can choose below either the geocacher's method or the letterboxer's method. If you get a little stuck at one method or another, you can always use both. Since there are two methods here on how to get the cache, then no additional hints will be given. If you come to this hide with a friend or group, why not consider that one of you try to find the cache with one method, while the other tries the other method? Who will find the cache first? 
GEOCACHER'S METHOD
The posted coordinates bring you to a store sign, yet this is not the location of the geocache. The geocache must be found by solving the field puzzle that gives the coordinate values for A, B, C, and D missing from the cache location coordinates:
N 47 36.ABB W052 42.ACD
There are five words in the slogan on the sign if we count the symbol in the slogan as a word, since the symbol represents a word. Using this slogan, the missing values are found according to:
A = the number of letters in the first word plus the number of letters in the fourth word
B = the number of letters in the last word
C = the number of letters in the first word subtract the number of letters in the word represented by the symbol
D = the number of letters in the first word first word plus the number of letters in the second word.
If you think you have all of the correct values, go to the link below to confirm you have the correct coordinates, and make your way to the geocache! Remember, geocachers, sign the logbook! 
(Do not take the stamp or stamp pad from the geocache; these are not geocaching trade items.)
LETTERBOXER'S METHOD
To find the letterbox, go to the posted coordinates. From there, look towards the bridge. Just beyond the bridge there is a path. Start in on the path, looking for a large stump of a tree (approximately 1' in diameter) which is sawed off quite tight to the ground. From this point, about 100 adult paces in on the path will get you to a point where there is a dead tree on your left. From that point turn right and go in to the bushes. The cache is at the base of a Betula papyrifera. Remember, letterboxers, to stamp the book with your stamp, and to use the stamp in the letterbox to stamp your book.
We hope you've enjoyed this caching / letterboxing experience, and have learned how the two hobbies can go hand-in-hand from this geocacher's perspective. We have another letterbox in the metro area, GC7126T, if you'd like to find another letterbox hybrid.
Cheers!
CtB!