Subterrainian inspection chamber cover

Very interesting image; and there are interesting characters too, whom we call poets; here is one sings about this image!!! PS The poets talks about American drainage cover of course

The beauty of manhole covers--what of that?
Like medals struck by a great savage khan,
Like Mayan calendar stones, unliftable, indecipherable,
Not like the old electrum, chased and scored,
Mottoed and sculptured to a turn,
But notched and whelked and pocked and smashed
With the great company names
(Gentle Bethlehem, smiling United States).
This rustproof artifact of my street,
Long after roads are melted away will lie
Sidewise in the grave of the iron-old world,
Bitten at the edges,
Strong with its cryptic American,
Its dated beauty.

~ Karl Shapiro