Edit: Here is a video walk-through of the bunker!
https://www.youtube.com/watch?v=QFynhHBPzm4&feature=youtu.be
http://i.imgur.com/i7KJeJG.jpg
http://i.imgur.com/jOtxWlb.jpg
Here is a tutorial on how to do it.
http://www.reddit.com/r/DestinyTheGame/comments/2b80fh/hidden_area_glitch_seraphim_vault/
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http://www.ustream.tv/channel/sgtdrderp-s-ps4-live-show me and two other brave gaurdians met at random in the tower, and having heard of rumors of the legendary vault of seraphs, went in search for glory. we were successful in our missions and we return triumphant to the tower to share our knowledge of the wilds. behold fellow guardians, see what you were not meant to see.