navel

napa puhekieltä The indentation or bump remaining in the abdomen of mammals where the umbilical cord was attached before birth.
The central part or point of anything; the middle.
John Milton

Within the navel of this hideous wood,Immured in cypress shades, a sorcerer dwells.

We sat alfresco on the edge of a “square,” in reality a pond of cobbly mud with a plinth plonked in its navel (..)