After dropping a few pairs of binoculars and knocking them out of alignment, I decided to grab a monocular a few years ago. I nabbed one from REI that zooms from 10x to 30x magnification, which is a bit too much for the field of view. Very tricky to keep it still.

I still bring it every time because it's useful for spotting wildlife from a safe, unobtrusive distance. I sometimes lash it to a trekking pole to stabilize it, which helps. Might be fun to look at the moon and planets, but I haven't tried it for that yet.

Mine doesn't have it, but I've seen some monoculars with phone mounts so you can take pictures through it.