Alnwick Castle by airshoot.co.uk United Kingdom. Alnwick Castle is the second largest inhabited castle in the country; home to the Duke of Northumberland's family, the Percys, for over 700 years. Combining magnificent medieval architecture with sumptuous Italianate State Rooms, Alnwick Castle is one of the UK's most significant heritage destinations and best days out in Northumberland.The castle's rich history is brimming with drama, intrigue, and extraordinary people; from a gunpowder plotter and visionary collectors, to decadent hosts and medieval England's most celebrated knight: Harry Hotspur.In recent years it has also taken starring roles in a number of film and television productions, soon to feature as the magnificent Brancaster Castle in Downton Abbey's 2014 Christmas special and previously appearing as Hogwarts School of Witchcraft and Wizardry in the Harry Potter films.At the castle there is so much to entertain adults and children alike, making a family day out full of fun and history.Tickets to the castle can be validated for unlimited free visits for 12 months at no extra cost (read T&Cs), so you can take advantage of all the fantastic events throughout the season.Entertainment from fire-eating jesters, courageous knights, master falconers, and medieval artisans (and even the occasional dragon!) takes place throughout the castle's open season.All performances and activities all free with admission. View Alnwick Castle's full events calendar.Aspiring knights and princesses can follow in the footsteps of Harry Hotspur, as they dress up in medieval finery and try their hand at free traditional crafts, swordplay and medieval games in the bustling Knight's Quest arena. www.visitnorthumberland.com Aerial view around Alnwick Castle in Northumberland, with some interesting facts.