Located in an outdoor sports park in Reusel, the Netherlands, the structure is made up of six boxes, with the interesting feature of a rock climbing wall on the side.
Walls are constructed out of halved logs, which were grown in the surrounding forest. This structure is supported by a steel frame in both the horizontal and vertical direction.
Implications - It's hard to look at something like this and not be transported back to the halcyon days of my youth and my dreams of building a livable treehouse. The fact that this exists is a testament to the irrational dreams of youth everywhere.