TERRAIN NOTE: If you hike up, this could rate much higher than a 2!
On top of Stone Mountain is a microwave transmitter antenna. It's on the skylift support tower. When I placed this cache originally, I could not figure out what this thing is for or what it's really aimed at.
Update: June 7, 2015. Mystery SOLVED! According to member GDM, and confirmed via some additional research with FCC databases, this tower is part of Dekalb County two-way mobile radio system. Quoting:
The system belongs to Dekalb County and is used to support the County Sheriff and Fire Department's two-way mobile radio system. The microwave system is configured into a 10 hop loop (for route diversity), with one redundant spur link. There are two dishes on Stone Mountain the belong to this system, and which are part of the loop. The dish that points north on an azimuth of 306.73 degrees is communicating with a site called Fire Station #19 (N34 52' 29.0" W084 15' 24.0"), which is 8.01 miles away. The dish that points south on an azimuth of 173.34 degrees is communicating with a site called Mystery Valley (N33 45' 56.0" W084 08' 22.0"), which is 2.76 miles away. That's probably a lot more than you wanted to know - but hope you find it of interest.
There are other (now archived) caches along the microwave transmitter path: see GCMVQ5 Stop, Drop, and Roll for the next tower hop north; and then from there you can visit the end point, the large office tower near GC444PG, Ravinia BenchmArc (Ravinia 3).
Update: July 13, 2025. This cache is 24 years old!? Wow! I haven't been out caching in years and still get email notifications about this one.