When we first moved in, the narrow space between the house and the fence had been used for a dog-run. An ugly but very secure chain-link fence covered each end. It took a deal of work to remove (and I have a photo of Mark rocking out one of the securely-concreted posts in a manly fashion). After that, though, what to do with a narrow overshaded run?
Build a cable-ride, obviously.
Mark pointed out that however cool a cable-ride is, inherently, eventually it will be grown out of, and what is one to do with the rather large supporting structure afterwards?
Oh, I said, use it for a arbor, or a support for a garden swing.
It took a few years to get around to making the cable-ride, time to research designs, look for an affordable (non-industrial level) setup, etc. The actual building didn't take that long, once we had all the bits.
Like most such innovations, it was used extensively for the first while, then when visitors came, parties & birthdays, and eventually the available children all grew too heavy (I can't remember what weight the grip was tested to - 100 lb?).
The lilac tree that Mark had cut down to a stump decided to take it as a severe but kindly pruning, and sprouted up and around the posts and platform. The various cats found the platform an excellent belvedere.
About 10 (15?) years ago I found a hanging wicker chair at a garage sale. The porch had no place strong enough to support a hanging chair, so I stuck it in the attic. Because hanging chairs are cool, and I'd always wanted one, and someday I'd have a place to put it.
This year, in the process of pruning, I reached the lilac tree and the cable-ride posts. With a prybar, a hammer, and my husband's suggestions, I got the platform off (to the later grief of cats, I'm sure).
I sawed off the two branches that ran across the middle of the space and suddenly it opened up beautifully, while enough leafiness remained above for comfortable shade.
I brought the chair down from the attic. The hook on the chain fit perfectly through the eye that had secured the cable. The length of the chain was just right for gentle foot pressure to steady the chair or set it swinging.
It was meant to be. For perfection I only needed the addition of a cat or a laptop. I've tried out the first, and will be checking out the second shortly.