Ride a double-decker bus in London

“When I visited London, that's one of the first things I did. The view was magnificent. I rode the tube once just so I could say I rode the tube but double deckers was the way I moved around the city. I miss it dearly.”

“If you want the bus experience, just go on one of the many tourist "hop on hop off" buses. They go around all the major sights, and give you a nice explanatory commentary. They are VERY common. [...] It's worth it. It's an efficient way to see a lot of London in a day. And you can jump on/off as the mood takes you. Admittedly, it's a very "touristy" thing to do, but I still think it's good. I lived there for ten years, but when friends came to visit, I took them on a bus sightseeing tour. Many times.”