This Reverse Wherigo cache begins at the iconic Fanad Lighthouse. The area has magnificent views and is steeped in history of shipwrecks, sunken gold, etc. Parking is available near the posted coordinates and at the final location.
Reverse Wherigo
To start this adventure, first you will need to download the Reverse Wherigo Cartridge on to your smartphone or GPS, if compatible. An app will be required to find this cache. We use Wherigo for iPhone. We understand that other apps, such as WhereYouGo are available for android phones.
Click here for Link.

Reverse Wherigo Box.
This Wherigo allows you to search for the cache using only distance clues (no directions). The first Reverse Wherigo GC357G1 was created by Waldmeister. The basic idea is to find the final while being given only your distance to it. To get the current distance, you can ask the Reverse Cache Box in your inventory, but it won't tell you the direction - that's for you to figure out! There's no limit to how many times you can ask, but try to keep your number of guesses as low as possible. All instructions and necessary information needed to complete the cartridge are provided in the cartridge itself, which is multilingual.
When prompted you will have to type a three six-digit initiation code into your Wherigo player.
The information board at the posted coordinates has a number of dates which you will use to obtain letters as follows.
ABAC - The year that the first lighthouse was lit.
ABAA - The year that the HMS Saldahna was wrecked.
ABBD - The year to which the present lighthouse dates.
AEFD - The year that the lighthouse was upgraded.
AECG - The year that the lighthouse was automated.
Now replace the letters below to obtain the required three six-digit numbers.
FFG332
424DGF
FEGCAC
If you are having difficulty with the Wherigo App please send your three six-digit numbers to the CO via the 'message the owner' link above.