What mysterious objects has John seen in "By the Waters of Babylon"?

John's innoeent and somewhat naive perspective in "By the
Waters of Babylon" forces reader to eye his journey through the fallen remains of our
own modern society through a fresh pair of eyes. John encounters many common place
objects throughout the course of his trip to the Place of the
Gods:

"great spike of rusted metal sticking out into the
river"-- This obscure reference could possibly mean the remnants of the George
Washington Bridge in New York.

"Everywhere in it
there are god-roads, though most are cracked and broken." This quote describes broken
highways and overpasses in New York City.

"there was a
carved stone with cut—letters, broken in half. I can read letters but I could not
understand these. They said UBTREAS." John is at the Subtreasury Building in New York.

"They got their food from enchanted boxes and jars." John
unknowingly refers to canned goods and sodas. Later, when John flees the pack of wild
dogs, he finds and consumes possibly a bottle of wine, commenting that the drink made
his head swim.

"On one side of it was a bronze door that
could not be opened, for it had no handle." John sees an elevator door for the apartment
building, but of course, without electricity, he cannot make it
open.

"There was a cooking-place but no wood" refers to an
electric stove top in the kitchen. The kitchen proves quite a mystery to John,
especially the sink with its labeled handles for 'hot' and
'cold'.