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 Cosmic Astronaut
Geocaching Reference Number TBWRTP

Worth 20 Points (Create an account to enter TB tracking number and earn points!)

 
POTAM Cosmic Astronaut Tracking Bug Image


Operatives will discover this intelligence in a TOP SECRET document as part of the FBZ 53 (Mission Gorge) Operation Silverback engagement.

Its discovery is worth 20 points towards an operative's rank on this Web site!
 
   
     

Operatives who have logged this TB...

  •  THEJJDUO
  •  (Tue 26 Feb 2013 @ 12:28:00 GMT; 1361881680 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  •  THESPEIS
  •  (Sun 27 Oct 2013 @ 20:42:12 GMT; 1382906532 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  •  OESTEADO
  •  (Sun 10 May 2015 @ 11:54:13 BST; 1431255253 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  •  CCC
  •  (Mon 25 Jan 2016 @ 14:35:43 GMT; 1453732543 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  •  ELANASTAHL
  •  (Mon 07 Aug 2017 @ 10:25:03 BST; 1502097903 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  •  HDAGENAIS
  •  (Mon 07 Aug 2017 @ 10:34:06 BST; 1502098446 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  •  JULESVERNE
  •  (Wed 02 Feb 2022 @ 11:16:37 GMT; 1643800597 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  •  STANSD
  •  (Mon 10 Jul 2023 @ 17:28:43 BST; 1689006523 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  •  DICKANDALE
  •  (Sun 10 Mar 2024 @ 13:48:58 GMT; 1710078538 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  •  MPARK65
  •  (Sun 19 May 2024 @ 15:03:21 BST; 1716127401 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  •  FEBONIOCLAN
  •  (Sun 19 May 2024 @ 21:35:07 BST; 1716150907 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  •  MAGICN3
  •  (Wed 12 Jun 2024 @ 13:11:18 BST; 1718194278 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  •  MIKE2FIND
  •  (Thu 20 Jun 2024 @ 5:33:21 BST; 1718858001 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).