This is a Wherigo cache, which can only be found by downloading a Cartridge on to your GPSr or using an app on your phone. I have tested it with the Wherigo app on my phone using iOS and it worked fine, and the Cartridge itself has been used for numerous caches around the world. You will need to download the Reverse Wherigo Cartridge created by -Waldmeister-, which is available to download here.
The Cartridge tells you how far away you are from the final cache hide, but not the direction in which you need to go. Once you start the Cartridge going, set it up by choosing your language and measurement unit. Then input that you want to Play (not Create) a Reverse Wherigo. Then input three sets of 6 numbers (see below) one at a time. You can then look in your Inventory for the Reverse Cache Box. Click on that to display the distance to the cache. The Cartridge keeps a tally of how many times you look at the Reverse Cache Box to get the distance, although it doesn't seem to matter if you look numerous times (as far as I have experienced).
Start at the way point posted on cache page: At this WP you will find A NO ENTRY sign with a 5 digit on the back. Record them as A to E Use those numbers to make the three lines of 6 digits for the Wherigo Cartridge.
9B53A5
1525CD
BE4922
Parking coordinates added to page. Hope you enjoy these reverse wherigos which takes you on a nice walk with some good views.
Keep hold of these numbers: if the cartridge crashes you will need to put them in again to continue. Once you complete the cartridge you will get a code so that you can create your own Reverse Wherigo anywhere you like, just make sure you tell Waldmeister about your cache.