Located near the village of Ivinghoe in Buckinghamshire, the prominent hill of Ivinghoe Beacon stands 233 metres above sea level. It is not the highest point in the area, but according to the National Trust, who own and manage the area, Ivinghoe Beacon offers the best view points and is a popular spot for walkers, sightseers and model aircraft pilots... flyers... drivers... whatever. For the walkers amongst you, there is a 3 mile walk up to the Beacon and through the surrounding areas. If you're not a walker (like me) you can park up the top near the Beacon itself. Ivinghoe Beacon's relative proximity to the film studios at Elstree means that it has appeared in several different movies and television shows including Batman Begins 2 and the Dirty Dozen, as well as (of course) Harry Potter.
After walking through nearby Ashridge Wood (as mentioned in the "F" post), Harry, Hermione, the Weasleys and the Diggorys climb Ivinghoe Beacon search of the Portkey that will transport them to the Quidditch World Cup in The Goblet of Fire.
Don't forget - I'm also cross stitching for the A-Z challenge over at Fangirl Stitches - both a Pokemon alphabet and a Supernatural one.