Forbidden Zone Geocaches
 
   
 
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
· The Monkey's Triangle
· Warlock Mine
 
 


 
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Journal Entries
 
 
 
· The Fool in the Rain [8/25/25]
· Reporting for Duty [2/24/25]
· Introduction [3/29/23] Normal.gif

[ More in Journal Section ]
 
 


 
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
 
 


 << SGTF Special Operations
POTAM TOL 09
Geocaching Reference Number TB3VY4F

Worth 60 Points (Create an account to enter TB tracking number and earn points!)

 
POTAM TOL 09 Tracking Bug Image

Current GOAL:
Operatives can discover this intelligence (codename POTAM TOL 09) as part of the final classified Operation Silverback mission.

Its discovery is worth 60 points on this Web site!


About This Item:
Its true whereabouts are unknown, but most suspect this TOP SECRET project coin is maintained in an undisclosed location in the mountains of Southern California.
 
   
     

Operatives who have logged this TB...

  •  BALCANTHEZ
  •  (Sun 25 Mar 2012 @ 11:55:37 BST; 1332672937 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  •  OESTEADO
  •  (Sun 09 Apr 2017 @ 13:58:11 BST; 1491742691 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  •  FLAGMAN
  •  (Thu 01 Jun 2023 @ 20:47:46 BST; 1685648866 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  •  STANSD
  •  (Wed 28 Jun 2023 @ 13:03:01 BST; 1687953781 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  •  DICKANDALE
  •  (Thu 07 Mar 2024 @ 18:49:22 GMT; 1709837362 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  •  MPARK65
  •  (Wed 12 Jun 2024 @ 9:00:05 BST; 1718179205 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  •  MAGICN3
  •  (Wed 12 Jun 2024 @ 13:20:16 BST; 1718194816 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  •  MIKE2FIND
  •  (Tue 01 Oct 2024 @ 11:49:27 BST; 1727779767 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
   

 
   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).