This 25 metre tall viewing tower is the brainchild of Dutch architects Ateliereen Architecten.
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.