Cast iron dragon from behind with cranes in the distance

I think since the 1960s the City of London’s boundaries have been marked by small cast iron statues of dragons on top of stone pillars.

Along with another fiercer-looking dragon at Temple Bar, they are dotted around in order to let you know when you’re leaving the wider area of London and entering the square mile that is known among other things for being the financial district.

To find out more about the difference between the City of London and the city named London I’d recommend you watch this video. It explains it much more clearly than I could!