The cache is a nano hidden at the Valley end of the Stanley Enbankment. Locals know this area as 'The Cob'. It connects Holy Island with the Isle of Anglesey using roads, train lines and a cycle path which is route 8 on the sustrans network. There is only the log to sign, please bring your own pencil and tweezers!
The Cob was designed and built by Thomas Tellford who named it after the Stanley family. They owned the Penrhos estate, which can be seen if you look over to the left, over Beddmanarch bay infront. The wall between the trainline and the road was built in 1848 to stop the steam trains spooking the horses as they made their way back and forth along the cob. Before the cob was built, the only way over was over the sands at low spring tide or by going around the long way over Four mile bridge, which is as the name suggests, is four miles from holyhead. The large rectangluar piece sticking out along the cob is an old quay, used to offload supplies.
Close to GZ, under the now old disused tyre garage, is the site of the old Valley foundry. This foundry supplied most of the quarries and mines on the island with the machinery and steam engines to carry out their works. The crossing over the railway line, on the other side of the wall is still called Foundry crossing to this day.
Good Luck!