Two covers claim to the crown and both are from Rome, Italy.
One is the "Mouth of Truth" (La Bocca della Verità), which is attributed to the Roman period (the first century BC - that is, 2100 years ago)
The second was photographed on the lower floor of the Colosseum, an amphitheater that was established in the first century AC (i.e about 2000 years ago)
“Another contender for the crown,” although not a cover, is a pit from the period of the Great Revolt found on Mount Masada (66–73 CE) .

This London cap has a general shape of a triangle consisting of several circles.
The shape of the lid reminds many of the head of a bear, especially if the image rotates 45 degrees counterclockwise, in this case, the opening holes are used as the eyes of the bear.

The text on the next London lid indicates that the manhole cover is indeed a manhole cover

It is not clear what is special about the house at 10 Romema Street in Tel Aviv (Neot Afeka), which caused a special manhole cover for it

The Dead Sea is the lowest place in the world (439 meters below sea level). This manhole cover is located in Ein Bokek, on the shores of the Dead Sea.

The northernmost cap is located at latitude 69.6531417 North, in the city of Tromsø, Norway..

The southernmost cap is located at latitude 54.806464 South, in the city of Ushuaia, Argentina..

Similarmanhole covers can be found in different countries (mainly in Europe).
A manhole cover from Seville, Spain was found also in Paris, France as well as in Rome, Italy

On the one hand, the spiritual center of more than a billion believers, on the other a park to the banks of a river in one of the cities that a considerable part of the population is known as the "capital of sins"
The manhole cover in the Vatican in St. Peter's Square is also located in Hayarkon Park in Tel Aviv, Israel

Manhole covers from the British Mandate period or their inspiration can still be found in Israel
Cover photographed in Tel Aviv is identical to the cover in London .

And a wider cover from London was found in Tel-Aviv Later, the shape of the lid remained the same but the text was translated into Hebrew .

To this day, it is possible to find in Italy manhole covers with the symbol of the Fascist Party (Fasces - axe blade held in a bundle of wooden rods tied with red rope)
Such covers were found in Lecce , , and in Rome ,

Surprisingly, in the United States, which is so proud of the brand MADE IN USA, it is possible to find manhole covers that proudly bear the fact that they were manufactured elsewhere (mainly in India). This is puzzling given the large weight of the covers and shipping costs
The following caps were found in New York , , , and in Boston ,

A phenomenon discovered in two round caps surrounded by a square frame and adjacent to each other, the circular part is created by one manufacturer and the frame by another. This happens in many cases, and we would not bring it if it were not for these two caps, the manufacturer of the one lid is the manufacturer of the frame in the other and vice versa. Which suggests that perhaps the installers of the caps were simply confused
One lid and the other

Manhole covers are rarely used as advertisements for businesses. However, in the city of Giessen, Germany. A number of covers located on one of the streets advertise businesses (usually veterans) located in the area: ,
Another cover even indicates the walking time between the place of the cover and the store itself

Not only this site collects and records caps, there are several museums in the world that focus on manhole covers, for example the "The Museum of Water and Sewage" in the city of Bydgoszcz in Poland .

In Japan - which is a "paradise for manhole covers lovers", series of trading cards depicting manhole covers have even been issued, an initiative of GKP, a body that cooperates with local authorities in order to promote and publicize sewer caps (and others). In the following link, from the organization's website, you can see a number of collectible cards click to view

Sometimes manhole covers are used for purposes that the manufacturer of the covers may not have thought of. For example, covers can be used as the base for traffic light posts. .