Here’s how New York City’s manhole covers are made

There ’s a sealed ignored artistry to manhole top in New York City . Millions of the great unwashed walk over G every day and yield no attending to what they look like or where they ’re from or how they ’re made . They occur from all over the world , with one of the largest exporters of manhole covers being in Howrah , India . The methods they use there to forge these street caps seem to come from a different era . It ’s so fascinating to watch the mental process and the stamps and the molten metallic element and the design and the the literal branch employment required to make them .

National Geographic writes :

movie maker Natasha Raheja hunt the ancestry of New York City ’s famous manhole enshroud back to Howrah , India . In her moving-picture show , Cast in India , she goes inside one of Howrah ’s mill to glimpse the people behind the cover ’ creation .