This is an easy two stage multi. At the given coordinates you will find a commemorative plaque of a familiar shape. What is the name of the person who created the plaque?
After the cache was published I discovered there is a fee to enter these grounds but I assure you the object in question can be found in a few picture galleries of this mission. If you still want to visit the mission, be aware of the entry fees
Enter your answer into the checker and if correct, you will receive the coordinates of the container's location along with a hint of how it is hidden
Good luck and have fun
You can validate your puzzle solution with certitude.
Congratulations to In The Vault for being FTS and FTF. No cheating involved, it was my intention that there would be more than one way to get the answer