ART #83 It's a Mad Mad Mad Mad Cache Mystery Cache
ART #83 It's a Mad Mad Mad Mad Cache
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Difficulty:
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Terrain:
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Size: 
(small)
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Ammonoosuc Rail Train #83
The cache you seek is not at the posted coordinates, in fact the posted coordinates are pretty much random.
Here's what you need to know to find this cache...
Watch the movie "It's a Mad Mad Mad Mad World" (seriously, it's a classic, don't just google it).
In the movie what is everyone searching for? "It's under a big..."
Find that, you'll know it when you see it and it's about half way between cache #82 & #84. Then go to the tree that is straigh off the trail from it and look behind it.
Now, aren't you glad you watched the movie?
Additional Hints
(Decrypt)
Jung qb lbh zrna lbh qvqa'g jngpu gur zbivr?