We took the tube to Victoria and did a hop on/hop off bus tour for about 2.5 hours on the red line. The Original Tour bus company was running a special that let us use our pass for 48 hours instead of the normal 24, which was awesome. It also included a boat ride down the Thames so we totally took advantage of that too.
It was pretty overcast (but not rainy!) and we were determined to get the best views of everything so we rode on the top of the open-air bus in the front row for all 2.5 hours. By the time we got off, I was shivering and we ended up having to grab some hot chocolate to warm up! (They literally serve hot chocolate EVERYWHERE. It's like one of the best things about London!)
The Apple Store on Regent's Street.
The Tower of London is technically actually called "Her Majesty's Royal Palace and Fortress of the Tower of London." It was built in 1066 and used as a prison until 1952. It also served as a Royal Residence for a time, as well as a zoo to the pets that were given to the Royal Family as gifts from other countries. (What do you buy the person who has everything? A lion, apparently.)
Once inside, we headed straight for the Crown Jewels display. They didn't allow any photography inside, but it was a really neat exhibit. They had crowns and scepters from many kings and queens on display. One of the scepters had a diamond at the top of the staff that was like 35,000 carats. Can you imagine?? I've never seen anything like it. They had the displays in these huge glass cases, and then a slow-moving conveyor belt on either side that you stood on and it moved you past the displays slowly. I guess to keep the crowd moving -- so you had to look quickly while you had the chance.
After we saw the crown jewels, we headed towards the torture towers. They showed some medieval contraptions they used for torturing prisoners there.
Then we climbed the tower and walked all the way around one of the concentric perimeters of the place. Inside a few of the corner towers, there were still engravings on the walls from prisoners who had been held there. Some had signed their names, etc. They had plaques explaining the details of who some of them were and why they were being held, etc. I thought it was fascinating!