manhole cover

path on GitHub

https://github.com/davepinch/pinchy.cc/blob/master/content/topics/words/m/manhole-cover/manhole-cover.md

photograph

Manhole cover near Swamp Creek

random

Biblical value of pi (religions.wiki) The Bible seems to claim that the value of π (pi) is 3.

Wikidata

https://www.wikidata.org/wiki/Q652657

Wikipedia

https://en.wikipedia.org/wiki/Manhole_cover