This geocache is NOT at the posted coordinates
la·gniappe /ˌlanˈyap/ something given as a bonus or extra gift.
This is a bit of lagniappe for completing the Adventure Lab series Cities of the Dead. After completing the last lab cache you will be rewarded with the code word for the checker and coordinates to the geocache final. The lab adventure and bonus cache can be done day or night but please remember each cemetery has different closing times if you choose to visit inside the cemetery. A few suggested geocaches related to the lab adventures are as follows:
Necropolis, New Orleans Style
August 29, 2005-London Ave Canal
New Orleans Levee Breaches Part I
New Orleans Levee Breaches Part II
Potter's Field
Masonic Cemetery No. 2
And finally here is the link to the lab caches:
Cities of the Dead

You can validate your puzzle solution with certitude.