Thanks to NKD, I have some lovely pictures of Mermaid Rock to rotate through, some even with knitting content (stolen right out of my bag!). I don't know how well it comes across (the web still lacking good 3D rendering - get on that, son, would you?) that this rock is a veritable armchair of a rock, with a backrest, comfy ledge, and lovely golden sand to rest ones feet/tail in at the bottom of the lake.
It was one of my favorite summer spots as a child, and the "happy place" I chose to visualize in those childbirth classes. When the big tree that anchored it went over a few years ago, I was devastated. But the rock and the lake are still there, and if it's a tad harder for me to reach these days, that's just incentive to stay active and agile.