Coolest Kindergarten Ever Is a Circular Tree House

The Great Zelkova Tree

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ring around tree kindergarten tezuka

credit: Tezuka Architects

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The Ring Around a Tree is an annex to Tezuka's Fuji Kindergarten, an open, oval building that isn't lacking in great design itself. It is built around a huge zelkova tree whose trunk is so massive, two adults cannot touch hands around its base.