The first six structures were designed by five different architects.

tree-hotel (9)

tree-hotel (1)

tree-hotel (2)

tree-hotel (3)

tree-hotel (4)

tree-hotel (5)

tree-hotel (6)

tree-hotel (7)

tree-hotel (8)

tree-hotel (10)

tree-hotel (11)

tree-hotel (12)

tree-hotel (14)