(adsbygoogle = window.adsbygoogle || []).push({});
This is pretty much ripped from the You must login or register to view this content..
SOURCE:
You must login or register to view this content.
A quote from one of the comments:
"I think the strongest piece of evidence that we've not received all possible chests lies in the Planet Viewer. The 'Vault of Glass' icon still shows 'Rewards Available', and on Hard: 'Unknown Rewards'.
For Example:
When you finish the Daily Heroic, 'Special Rewards' are is no longer displayed
When you finish the Weekly Nightfall, 'Unknown Rewards' is no longer displayed
BUT:
You finish the Vault of Glass on Normal, and 'Rewards Available' still shows
You finish the Vault of Glass on Hard, and 'Unknown Rewards' is still displayed."
[/INDENT]
The most common theory is that one (of how many?) is at the Jumping Puzzle after taking down the Templar, because there are is a lot more area that seems to be of a quality fit for use/travelling to (the Vex Gate on the right when facing away from the Main Boss room.