ONE of the largest tree houses in the world opened to the public this week.
The £3.3m construction, which is turreted and stands up to 60ft off the ground, has been built in the grounds of Alnwick Castle, Northumberland, which was used during the filming of the Harry Potter movies.
The guge fun house has 4,000sq ft of suspended wooden walkways, has facilities for disabled people and can hold up to 300 people at a time.
Engineers have designed it to withstand all weathers including gale-force winds. It has been built from natural materials including Canadian cedar, Siberian larch, Scandinavian redwood and English and Scots pine.
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