The cache is NOT at the posted coordinates! However, these posted coordinates are a place where I have seen numerous shows, and spent many minutes listening to songs... Anyway, to get started complete the puzzle below. Once completed you can use the Certitude checker to verify your solution. You must then go to those validated coordinates to continue your journey towards finding this cache.
You can validate your puzzle solution with certitude.
Once at the validated coordinates, look inside and you should see a bright and colorful picture not too far from the entrance where you are located. You can only see one picture from that location; however, this picture is one in a series of eight. Using a bit of deductive reasoning, you should be able to determine how to find the others. To continue towards the cache, you will need to go to the one of those eight pictures that represents a tool used by the GrooGrux King.
Once you have found this picture, stand directly in front of it, and turn so your right shoulder is almost touching the picture (you should be facing West). Proceed to walk approximately 25 paces in the direction you are now facing and you should find yourself cornered, where you are unable to walk any further. That is where the cache is hidden.
D/T rating takes into consideration both the puzzle and the hide, without using the hint. An evening when there is live music at Merriweather Post Pavilion would not be a good time to try for this cache! There is nothing more than a log and a tiny stamp in the cache, so make sure you bring a pen and an ink pad. PLEASE DO NOT TAKE THE STAMP! The log book is small, so if you bring your own stamp, you may only be able to make a partial print on the log. An unactivated FTF micro coin was left with the cache for the FTF.
As always: Don't be that guy! Please leave the cache and stamp as good as or better than you found it.