new york city Five kids got lost (and then found) exploring New York City's sewer system David Pescovitz
teenage mutant ninja turtles Northampton installing new Ninja Turtles sewers, thanks to extra COVID relief funds Thom Dunn
rain The city of Santa Barbara warned residents to watch out for flying manhole covers Jason Weisberger
Boing Boing Gadgets Encode location data in the surface of manhole covers, help robots find their way Cory Doctorow