FBZ Missions  
  · Stone of the Lost Valley
· The Bunkers
· Mission Gorge
· Rock River Burial Mound
· Supernatural Supernova
· Little Green Men
· The Forbidden Zone
· The Doomsday Bomb

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  Journal Entries  
 
· Search 2026 [1/15/26]
· Agent Field Report [8/25/25]
· FBZ 54 Revisited [7/8/25]

[ See More Journals ]

  Silverback Cipher  
 
Silverback hunters should be familiar with the “pigpen” or masonic cipher, which is a simple substitution cipher exchanging letters for symbols based on a grid.

This cipher can be used to decrypt directions and secret codewords at FBZ geocaches!

  External Links  
  · 1: The CIA Vault
· 2: The FBI Vault
· 3: Project Blue Book
· 4: Aliens the Truth
· 5: The Black Vault

Surveillance Images

Photos shown here may yield clues to secrets at Forbidden Zone geocache locations!

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Surveillance Images > FBZ A.P.E. 53

FBZ A.P.E. 53
path.jpg
160 viewsHollows Trail
 		hollows_path.jpg
163 viewsForest Trail
 		spider_web.jpg
195 viewsThe Spider's Web
 		logs.jpg
158 viewsNear "Ground Zero"
arm.jpg
185 viewsThe Warlord's Ring!
 		bog.jpg
174 viewsBog In The Hollows
 		moon.jpg
155 viewsDarkness Comes To The Canyon
 		meadow.jpg
152 viewsThe Meadow
FallenB_P.jpg
170 viewsMy 2 nephews discovering part 2.
 		photo7.jpg
141 views 		photo6.jpg
143 views 		photo.jpg
149 views
49 pictures on 5 page(s) 1 2 3 4 5


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*Disclaimer: Stories here and at FBZ caches are a combination of historical conjecture, anecdote and pure fiction. Any similarity to any event, group, or person living or dead is merely coincidental. Additionally, SGTF has utilized a variety of signs/stickers as props in the FBZ geocaching series. Labels or warnings (e.g. biohazard, radioactive, etc.) which are fictitious will display some form of the SGTF/Silverback moniker; all other warning signage encountered during this or any other FBZ adventure should be respected and observed as posted.


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   Operation Silverback Prize Ring SILVERBACK Prize Rings

Those who create an account on fbz.geocaches.org and enter mission codewords and POTAM tracking bug numbers receive points towards an Operative ranking. Operatives who achieve the rank of General (700 points) are eligible to receive an official silver Operation Silverback GC.com trackable ring from Oakcoins. Gold rings are available for those who reach the rank of Green Beret (or higher).