In English mythology, Herne the Hunter is an equestrian ghost associated with Windsor Forest and Great Park in the English county of Berkshire.
Herne is said to have been a huntsman in the employ of King Richard II (reigned 1377-1399) in and around Windsor Forest. He saved the King's life when he was attacked by a cornered white hart, but was mortally wounded himself in the process. A local wizard brought him back to health using his magical powers, which entailed tying the dead animal's antlers on Herne's head. In return, however, Herne had to give up his hunting skills. The other king's huntsmen framed him as a thief. As a result he lost the favor of the king. He was found the next day, hanging dead from a lone oak tree. That same oak tree is in the Home Park at Windsor Castle. _Wikipedia
In some traditions of modern Wicca, Herne the Hunter is seen as a manifestation of the horned god, god of the forest, the green world.