I request a challenge checker for GC7P6T2 "Challenge Cache - Oldest of 1 type." The challenge is for cache hunters to find the oldest active cache of a particular type: Traditional, Unknown, Virtual, Multi, Earthcache, Letterbox Hybrid, Webcam, or Whereigo.
I did some homework to look up the oldest of each type. I included the list on the cache listing page.
If a cache hunter found a cache that is older than was is currently active, I will count that find as qualifying.