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YOSM #1298 Cefn Du Letterbox Hybrid

Hidden : 1/17/2026
Difficulty:
2.5 out of 5
Terrain:
3 out of 5

Size: Size:   small (small)

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Geocache Description:


Pillar at Cefn Du

A letterbox hybrid cache hidden by the trig at the top of Cefn Du. The cache is not hidden at the posted coordinates, but can be found by following the letterbox style instructions below.

To find the cache, first look north from the trig and find the large rock with the longitudinal crack. Pass through the metal gate and make your way to the rock. The cache is hidden to the left of the crack, behind a loose stone.

 


About Ye Ole Survey Monuments

Ye Ole Survey Monument (YOSM) is a captivating series of caches that pays homage to the remarkable legacy of OutForTheHunt's YSM series (GC45CC).

YOSM caches are strategically positioned at or near Trig Points. These triangulation stations have played a pivotal role as surveying landmarks, contributing to the mapping of expansive territories.

Some of these points, bearing historical significance, might now be situated on private land or have vanished with time. As a result, the caches are artfully placed in close proximity, reverently acknowledging the historical importance of these survey monuments.

More information, bookmarks and statistics can be found at the YOSM Website

If anybody would like to expand the Ye Ole Survey Monuments Series, please do.
I would ask that you request a number for your cache first at www.yosm.org.uk
so we can keep track of the numbers and names to avoid duplication.


Additional Hints (Decrypt)

Ernq gur pnpur cntr

Decryption Key

A|B|C|D|E|F|G|H|I|J|K|L|M
-------------------------
N|O|P|Q|R|S|T|U|V|W|X|Y|Z

(letter above equals below, and vice versa)