The posted coordinates are at one of my favorite places in Niles but this cache is not hidden there.
This cache is the bonus final for the Niles Adventure Adventure Lab. The final coordinates are near one of the stops and will be revealed when you complete that stop of the tour. No math, no counting, no gathering digits, just the coordinates.
The cache is a little erratic! A glacial erratic is a piece of rock that differs from the size and type of rock native to the area in which it rests. "Erratics" take their name from the Latin word errare, and are carried by glacial ice, often over distances of hundreds of kilometres. Erratics can range in size from pebbles to large boulders. (Wikipedia)
There are caches with different icons at each of the five stops of this Adventure Lab so with your visit you can make it a cool six icons and ten smilies! Plus you can visit the Leaning Tower of Niles (a half-scale replica of the Leaning Tower of Pisa) just down the street and log the classic virtual cache Scope This Out to make it a 7-icon day!
Niles Adventure Adventure Lab
Niles Adventure: Pioneer Park Letterbox
Niles Adventure: Niles Community Rain Garden
Meow! Katguy Finds 20,000!
Niles Adventure Bonus: I’m A Little Erratic
Niles Adventure: Sweeter Than Double Ds!
Scope This Out