Walton Spire.
Walton Spire built in Victorian times is rumoured to be erected on an ancient battle stone dating back to the Battle of Brunanburgh. It is thought that the battle stone is, in effect a gravestone marking a mass burial site for those that died in the battle.
In 937.A.D. King Athelstan, leader of warriors, ring-giver of men, and also his brother, the aetheling Edmund, struck life-long glory in strife around 'Brunanburgh'
The battle is considered one of the bloodiest of the period. Five "kings" and seven Viking jarls were killed in the battle. Two of Athelstan's cousins Alfric and Athelwin and a prominent Saxon bishop were also killed.
This poorly recalled battle is actually one of the most important in British history since Athelstan's crushing defeat of the combined Norse-Celtic force facing him irrevocably confirmed England as an Anglo-Saxon kingdom. He was militarily weakened however and the battle effectively forced all the kingdoms of the British Isles to consolidate in the positions they occupy today.
Unfortunately there is no direct access to the Spire and it can only be seen from afar.
The cache is a bison container.
Good luck.