Lake Grani Multi-cache
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Difficulty:
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Terrain:
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Size: 
(regular)
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The coordinates take you to Gallträsk. Walk around the little lake about 31 m over sea level, surrounded by hills of about 60 m over sea level.
At the southern shore there is a little house ON the water. How many small window panes are there all round the house? (They are more than ten.Some are alone. Some big windows consist of several small window panes.) Let their number be A. At the western end of Gallträsk there are some big stones at the road. Let their number be B. At the northern shore (W-ENE) there is a tree (or two) leaning into the lake. What kind of tree is it? Is it an oak (C=3), or a pine (C=4), or a birch/alder (C=5), or a spruce (C=6), or a juniper (C=7)? Alternatively: Find two letters and four numbers at the seamonster coming up from Gallträsk. The numbers in order may be wxyz. C=z-w-x-y. In the E-end (a bit south from the "sand beach") there is a brook draining the lake. How many alders (Alnus glutinosa) grow at the northern bank of the brook between the lake and the nearest road? Let their number be D. The cache is at N 60 13'.xxx E 24 44'.yyy where xxx = A*10 + B*D*D + 3 and yyy = C*37 Final cache may be hidden by snow in the winter
Additional Hints
(Decrypt)
Orarngu n cvar.
Yrff guna 10z sebz byq srapr naq nobhg gur fnzr sebz arj ebnq.