Manholes, which interconnect underground sewerage pipes, and serve as a point of entry for cleaning the pipes, are located at every major sewer pipe connection, and are capped with round manhole covers. So okay, if you are like me you maybe think the manhole and covers are round because the men that go down them are sort of round? Well, here is the scoop....they are round because their shape is not affected by heat, cold and street traffic running roughshod over them so they do not fall in. But, not all manhole's are the same as proven by a few pictures.
(The Capital of Slovakia)
Another reason for the manhole cover to be round is because once it is removed..
May you never look at another manhole the same............