Seems to be a little synchronicity going on here
What you mentioned there was mentioned at the start of this video I was just watching in almost the same words.
Incidentally this little technique, I was surprised to find it is a yogic one. Many years ago at a New Years party, assisted by a little cannabis at the time, I experienced this naturally when I literally became one with a clock tower far off in the distance. My bodily sense of touch or my sense of self gained a shape that contained the clock tower. I later experienced the same uniting with other things outside myself, although it’s not an easy thing to achieve unless you can first set aside identification with the typical self-other duality. Near the end of the video he gives a technique that helps to do that.