HFF and SOS!!

Plaza de Castilla, Madrid.
Normally filled solid with traffic. I caught a serendipitous phase in the traffic light signalling! Taken whilst waiting for a bus to take me to my next class. The bus stop is round the corner (It is one of 100s of bus stops here, mostly on three levels underground; this is the major transport hub for northern Madrid, but you wouldn't necessarily know it from this position!).