The other day I noticed a yellowish/white beacon-type of light (unfortunately, I forgot to take a screenshot), really thin and stretching to the sky, on the side of a mountain — just north of Hateno Village. I went in that direction, but unfortunately didn't get there before it disappeared, and didn't find anything in the location. This was not a beacon I placed with the scope or in the map directly, just to clarify.
Maybe a different thing, but I also saw a glow near Satori Mountain, but that looked kinda different — it was wider (not a "beacon") and blue. As I approached this one also seemed to not be visible any more (ended up finding a temple there, but since I saw the glow for very far away, it seems odd that the glow was there to mark this temple...).
What were these lights? Were they one-off things tied to these locations that I missed altogether? Or are they something that happens every once in a while in various places?