Vindicator's Cache
The Vindicator's Cache is found at [51.1, 79.1] on the bottom of the pond with Aqualir hovering above it on Socrethar's Rise in southern Shadowmoon Valley. The chest contains the 
[Vindicator's Armor Polish Kit] and 10-20 
[Garrison Resources].
Tracking quest[]
To check whether this chest has been looted, copy and paste this command into the chat window:
/run print(C_QuestLog.IsQuestFlaggedCompleted(33574))
If a "true" appears in the chat window, this chest has been looted; "false" indicates the opposite.
Patch changes[]
Patch 6.0.2 (2014-10-14): Added.
