Touristy areas in London

During my few weeks in London, I spent 1 day of every weekend as a day to go capture some shots.

Tower Bridge. I purposely went there at night to capture some night shots. I dont have my tripod with me.. else I think I should be able to capture a better one.

Trafalgar Square. I walked aimlessly from the Buckingham palace and reached this famous place. ( All the touristy spots in London are actually closeby to one another. So you can actually walk to all these places by foot and cover it in a day. :))
The tower clock @ Big Ben. This is another famous place which tourist shouldn't miss.