The Parliament Buildings with Big Ben (clock actually named after a short, bell shaped construction worker named Ben that helped to install it).
This is just to the left (upriver) of the parliament buildings. Whenever an official was convicted and condemned, he was escorted out of the building and down to this site on the river to take perhaps his last boat ride down the Thames to the infamous Tower of London.
The tower of London looks more like a castle.
I did not get to see much of Buckingham Palace. Apparently it is considered a major occurrence for one of the bus tour guides to spot royalty over the walls from the double decker bus (he said another operator had seen the princes playing tennis but he had never been able to catch sight of them on a tour).
One of the gates leading to Buckingham Palace.
There are old buildings and churches everywhere.
I heard someone say that 2 million people live in London; however, on any given day, there are 8 million people in the city. You know why? International visitors - tourists or on business. Whenever I went out, I was not surrounded by British people with British accents; but rather, people from a multitude of nations. Customs at Heathrow airport had longer lines than any other I've seen, and Americans were a definite minority among the Asians, Middle Easterners, and Africans in the non-European Union line. Believe it or not, after walking about London for most of the day, I slept pretty good that night.