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Signs of Civilisation Multi-cache

Hidden : 01/01/2021
3 out of 5
5 out of 5

Size: Size:   small (small)

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Geocache Description:

The local Undumbi people are the custodians of the land through which Schulz Canal (Kedron Brook) and Jackson Creek flows, and of the land where the former suburb Cribb Island is located.

Cribb Island was named after John George Cribb, purchased land there in 1863 for general farming purposes. Technically, it wasn't an island, but was bordered by both the Jackson and Serpentine Creeks. It's claim to fame is the Bee Gees, who grew up there. Over time, more and more of the land was reclaimed by the Brisbane Airport, who used the land in the construction of the airport, and more recently the second runway. The last inhabitant moved out of Cribb Island in 1980. The wide strips of land without trees are the fingerprints of the long gone Cribb Island streets, though in places you will also see left over bitumen, fence posts and street signs. Some basic history of Cribb Island is available here: In your logs, I'd love to see photos and more history of Cribb Island!

This multicache will take you through the Schulz Canal and Jackson Creek to see a few visible remnants of Cribb Island. To find the cache, you will need to visit four locations.


Jetty (posted coordinates)

A = the number of large vertical wooden posts on the jetty. Hint: the answer is more than 12!


Water under the bridge

B = the number of pylons holding up the remains of the bridge.

C = while in the water facing the bank, the number of small circles (approx 8cm diameter) etched into the concrete on the right hand side. Hint: C is even!


Boy oh boy

D = the number of letters in the full website URL, excluding punctuation.

E = the number of bolts on the base of the buoy - bolting on the top section.


First street

F = the number of black bars (or parts of bars).


The cache can be found at South 27° 21.(D/B - 4) (C - 1) (F - 2) East 153° 6.(E/2) (A - D + 4) (B - 1). The cache is a small preform tethered up the tree, and is more easily spotted from land.


A few more notes about this cache:

  • This is a significant paddle and is best undertaken on a high tide. On the day placed, the high tide was 2.4m.
  • You will be very close to the second runway at Boy oh Boy. Please obey the signs and avoid venturing into airport controlled space.
  • You are likely to encounter a significant number of mosquitoes at First Street. We're talking epic, biblical proportions. You have been warned!
  • You will be travelling through a fragile mangrove environment. Please minimise your environmental impact as much as possible. Sadly, there is a significant amount of rubbish in the area, and an informal CITO is highly recommended. You get no smilies for this, except perhaps from the local flora and fauna.  

Additional Hints (Decrypt)

Purpxfhz: N + O + P + Q + R + S = 58.

Decryption Key


(letter above equals below, and vice versa)