In conclusion, the round shape of manhole covers is a practical design choice born from historical necessity, safety considerations, and structural efficiency. By eliminating risks associated with other shapes, enabling easy handling, and providing superior stress distribution, round manhole covers have become the standard in modern urban infrastructure. As cities continue to evolve and expand, the unassuming round manhole cover stands as a testament to the power of thoughtful engineering in ensuring safety and efficiency in our increasingly complex environments.