Context Mussels are just one part of Warsaw’s water monitoring system and have never triggered an alarm. The alarm activates only if six out of eight mussels stay closed for over four minutes ...
Intersecting at the central Swietokrzyska station, Warsaw's M1 and M2 metro lines travel north to south and east to west to neighborhoods like Muranów, Praga and Powisle. Service starts at 5 a.m ...