First just one of the many places that Harry and Hermione camp while searching for Voldemort’s Horcruxes, the Forest of Dean soon played a pivotal role in their adventure when Hermione let their location slip while opening her bag, and Phineas Nigellus Black overheard. He quickly delivered the information to Snape, who took advantage of the situation and delivered Gryffindor’s sword to Harry by means of his Patronus (DH33).
When he found the sword, Harry was nearly killed as he tried to retrieve it, but was spared by Ron, who had found Harry and Hermione after leaving them several weeks prior (DH19).
The Forest of Dean is located in western England, near its border with Wales. Its history dates back thousands of years, having been used as everything from coal mines to a royal hunting ground.