The actual "City of London" itself is only a very small area -- the area that was originally within the city walls of the Roman city of Londinium. Most of the tourist attractions are in what is called the City of Westminster, but I did drop by the City of London to see the Tower Bridge, the Museum of London, and a few other things.
As usual -- click on the provided image to get a bigger and better image.
The Tower Bridge, in the distance.
I took this picture of a Curious Coffee cup with the Tower Bridge in the
background, so I could get free espressos at the Curious Coffee shop
next to my apartment.
From inside the Museum of London, there is a window overlooking a
surviving segment of the original Roman wall.
After returning to the City of Westminster, I took another shot of the
Curious Coffee cup, with Big Ben in the background.