I know this has nothing to do with space exploration, but my Dad posted a video of his trip up and down the spiral staircase he built around the outside of a tree on his property (I grew on up Hornby Island, BC). The staircase has 99 stairs and goes up for about 75 feet (25 meters). He’s built a platform at the top where you can sit and see mountains and the ocean. And I spend my summer visits pulling the kids off the thing. Here’s a link to Dad’s blog (he’s a photographer, by trade, so I have a well documented childhood).
P.S. Oh, and Dad made it clear that the bird’s nest was old and empty.