Growing up in the middle of Manhattan, my wilderness adventures consisted of climbing trees in Riverside Park. I had always wanted to build a tree house and I continue to be fascinated about creating a small living space above the high branches. The design of the Senior-Center-turned tree house speaks to this nostalgia. However, rather than just gazing at the tree house from the Senior Center housing, I think that providing some kind of access to the structure, such as a ramp or a lift, would provide a richer experience than simply gazing up and remembering the past. A number of architects are designing tree houses for adults – some are even hotels that compete with bird nests.