Well Well Well Mystery Cache
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An homage to a classic, Two Springs by The Mad King Pellinore. GCGA6Y. Two Springs will be 10 years old this Spring.
Visiting that cache page will not help with this puzzle, but it is a fun cache to solve and find.
The listed coordinates will bring you to a location where a historic house once stood, and where there was a well in the front yard. There are two more wells located in this municipality, each in a yard, and each yard displays a blue historical marker sign as well.
Find the other two wells. You now have a triangle.
Adding a 4th point outside this triangle creates a parallelogram. Fun with Geometry. Oh wait a minute, there are three possible locations for the 4th point. Aha, now you get it. The cache is hidden at one of these 4th points.
Two of the potential locations just don't make sense. This is not hidden in a residential or commercial area. Do not go there to look for anything.
A fuzzy geochecker has been added to help you out. I wish you well.
Additional Hints
(Decrypt)
Raq bs n snyyra gerr.
Treasures
You'll collect a digital Treasure from one of these collections when you find and log this geocache:

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