This cache is at the posted coordinates - but you need to qualify before you can log it as a find!
To qualify for this challenge, you need to find 2,000 non-traditional caches. That's 2,000 finds that aren't traditional caches, and that aren't lab caches since there are currently limitations for geocheckers. But, that still leaves Unknown, Multicaches, Letterbox Hybrids, WhereIGos, Virtuals Earthcaches, Events, CITOs, MegaEvents, WebCams, and few other types that I'll save a little space by not mentioning explicitly.
There have been a number of non-traditional challenges placed in Northeast Illinois over the years, but this one is pretty simple: find non-traditional caches, keep finding non-traditional caches, find a lot of non-traditional caches! This checker can verify that you've found enough to qualify:

sgauss has used Project-GC to see if they qualified for this challenge and they did. User has 6116 finds (2000 needed).Filters:( types (Unknown Cache , Multi-cache , Event Cache , Earthcache , Letterbox Hybrid , Cache In Trash Out Event , Virtual Cache , Wherigo Cache , Webcam Cache , Lost and Found Event Cache , Locationless (Reverse) Cache , Mega-Event Cache , GPS Adventures Exhibit , Project APE Cache , Groundspeak Block Party , Giga-Event Cache , Groundspeak HQ , Groundspeak Lost and Found Celebration) )