Walls define a boundary.
Sometimes you build the wall yourself, as protection, and announcement.
Sometimes someone builds the wall for you, to protect themselves.
When bone-dead trees extruded from the ground and surrounded the coastline with impenetrable thickets, impervious to fire and force, we didn’t know who caused it to happen. We don’t know if they were meant to keep us in, or keep something out. We still don’t know.
We can climb them, or fly right over them in our planes and jets and helicopters, obviously, but they’re troubling.
Especially in light of the seismic readings we’ve been getting from the sea depths the last few days. The other scientists are very concerned, in a scientific way.
Me, I think the country itself is preparing for something very, very bad.
Possibly something without, say, thumbs.