The city’s veins beneath the asphalt. Prague is not just what we see above ground. The real heartbeat of the metropolis lies several meters below the surface. As part of next Prague’s Big Changes, we focused on technical infrastructure. How does the system that supplies over a million people with drinking water every day work? Where does Prague’s rainfall go? Another big topic was the planned Sewer B, which precedes the settlement of Prague’s largest brownfield site, Bubny-Zátory.