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Manhole covers are those heavy, often round lids you see on sidewalks and streets that cover access points to underground utilities like sewers, water systems, or electrical cables. They’re typically made of cast iron or steel and designed to be durable and secure. The round shape is actually quite practical—it’s the only shape that won’t fall through the hole it covers, which is an important safety feature.

They come in various designs and sometimes even have interesting patterns or city emblems on them. In some places, you might find manhole covers that have become small art pieces, reflecting local culture or history. Do you have a specific question about manhole covers or are you curious about their design and history?