Three short lines hold a small, odd scene. The speaker and at least one companion, since the word is "us," have spent the whole morning lost in a marsh. Nothing is said about panic or rescue. Instead, the last line gives us a tower that seems to be "with us," as if it were another traveler.
The title, "Landmark," is where the quiet irony sits. A landmark is meant to help you find your way, yet here the group is lost anyway. Still, the tower doesn't vanish. It stays in view, or in mind, and that gives it a strange companionship. It can be seen, but it doesn't solve the problem of getting out of the mud and reeds.
The mood is calm, a little dreamlike, and gently humorous. The speaker doesn't sound frightened. Being lost feels almost like a shared experience, with the tower as a silent, steady presence. The missing punctuation and the way the lines drift down the page echo the wandering itself.