This cache is a small magnetic key holder.
This letterbox puzzle is a great puzzle for kids and adults alike.
Like most letterboxes, the posted coordinates are not where the cache is, but where your journey begins.
There are digital breadcrumbs along the way to the cache. 
How to find the coordinates for the first breadcrumb: Go to the posted coordinates, and the coordinates for the first breadcrumb are at N 36 00.AB W 078 55.C2D where A = How many times "N" is repeated here multiplied by 2, B = the square root of the number of steps here multiplied by 10, C = B divided by 10, and D is the first digit of where you are.
The top left breadcrumb is the first breadcrumb. Then follow the breadcrumbs in the order listed (from left to right, beginning with the top left picture -- when you reach the end of the row, move to the left picture in the next row).
We got inspired to make this geocache because of the geocache Seeing is Believing (GC1N9CM)
The breadcrumbs are on the same side of the street (with the exception of the cache). A few of the breadcrumbs have indicators on them. Heed them.
Here are the breadcrumbs:
