For my first attempt to hide a cache I've chosen something easy, but I think the area deserves a cache. As this is my "firstborn" I will not change the starting point.
N1 = 48° 16.068 and E1 = 16° 22.597.
Use the hint, as the sign is no longer visible due to the noise-barriers. The original question was to look for two numbers, separated by a comma (A,B).
N2 = N1 - (A+B)/2 = 48° 16.062 and E2 = E1 - B*67 = 16° 22.262.
Three large letters are indicating some surprises (but you don't have to take them as an order). Convert the letters to numbers (A=1, B=2, ... Z=26) in order to get the numbers C, D and D.
In summer you can buy something to drink near this place.
N3 = N2 + 17*D and E3 = E2 - C*25
You will find some bilingual information about the place here. Take the number of standing stones as F and the number of cherry-trees as G.
STAGE 4 = the Cache:
N4 = N3 + F/10 + 1 and E4 = E3 + A + B + D - G
The place is quite open, so I tried to hide the box especially well so it can't be seen accidentally. You may have to look very closely. The cache consists of a small round plastic-box. Please bring your own pen.
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