The Alnwick Garden results from the Duchess of Northumberland’s wish to create a beautiful public space accessible to everyone. The previously derelict 12-acre walled site is now one of the most spectacular gardens in the country and features, in addition to one of the largest wooden tree houses in the world, The Grand Cascade, the largest water feature of its kind in the UK; The Poison Garden, which contains some of the deadliest plants known to man; The Garden for the Senses; and many other beautiful but contrasting spaces.