theoddmentemporium:

Puzzlewood is an ancient woodland site, near Coleford in the Forest of Dean, Gloucestershire, England. The site, covering 14 acres, shows evidence of open cast iron ore mining dating from the Roman period, and possibly earlier.

In 1848 some workmen, after moving a block of stone in the woods, found a small cavity in the rocks. In this cavity, hidden away, were three earthenware jars containing over 3,000 Roman coins. No-one knows why the coins were hidden away in the cliff face nor by whom.

J. R. R. Tolkien, a frequent visitor to the Forest of Dean, may have visited Puzzlewood, and many believe Puzzlewood was the inspiration for the fabled forests of Middle-earth, such as the Old Forest, Mirkwood, Fangorn or Lothlórien contained within The Lord of the Rings. J.K Rowling is also said to have visited Puzzlewood, and it may have been this that influenced her idea of The Forbidden Forest in the Harry Potter books.