Elemonator 5

The cache
is not at the posted coordinates. Please solve the puzzle below to find
the actual cache location.
This cache is part of The Atoz Sequence series.
Click
here
for more information. Each of the first seven "Elemonator" caches
contains ONE Atoz clue.
The "Elemonator" caches can be found on an easy hike along Coffenbury Lake.
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Whazitcalled?
(Enter the name of the huge round thing
- the specific name of the one at that location, not the generic name. Use the name as it appears in the
Wiki entry.)
Hike!