This cache is a reverse wherigo located in Charlton. You must use the below cartridge or certain available online tools in order to obtain the coordinates for the cache. The information below is necessary in order to obtain the cache coordinates.
Reverse Wherigo cartridge link
The following six-digit numbers are needed for completion of this wherigo:
391312
406602
556667
Note: this cache is located a rest area that is only accessible from I-90 Westbound!