Alnwick Garden
By the TreeHouse Co.
Kilmarnock, Scotland
$4 million to $6 million
When the Duke and Duchess of Northumberland laid out plans to create the largest public gardens in all of Europe, they commissioned the TreeHouse Co. to create a gigantic tree house that would house a 120-seat restaurant, a retail shop, two classrooms, and two private dining rooms. Opened in January, 2005, the Treehouse at Alnwick Gardens is a labyrinth of turrets, treetop walkways, and cavernous spaces. At 6,000 square feet, it’s one of the largest wooden tree houses in the world.
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