Alnwick Garden was created by the Duchess of Northumberland in 2001. It is unique and designed to be unconventional. As well as traditional features like a rose garden and an ornamental garden, it has the beguiling (and dangerous!) poison garden, a bamboo labyrinth, an astonishing ‘grand cascade’ – and the biggest tree house you’ve ever seen. Probably. It claims to have the largest collection of European plants in the UK and the largest Japanese Cherry Orchard in the World.
Alnwick Garden has a policy of free entry for children with paying adults – check its website for details.