There must be billions of them in the world. We pass them every day. We walk on them. We do not take any notice of them. They are heavy, and usually made of cast iron. They come in many different shapes, sizes and patterns. Look, and you will find them everywhere.
What are they? MANHOLE COVERS, that provide access to local service systems such as water, electricity, gas, and telecommunications.
Post photos of any interesting ones you find here.
Tomoe N
Water supply air valve Drinking water
Sep 5
Heleen de Vaan
Manhole cover in Zaandam (the Netherlands), showing the coat of arms of Zaandam:
Sep 11
Jeanette Geissler
Gullydeckel in Trient Italy
Sep 13