I just love London, this city is so cool, full of great ideas. Most of the museums are free, which is very good for the mind's creativity, it's like feeding the brain with all you can eat free art. I didn't have time to do all the museums since i was there for a short course but i did see the Modern Tate Gallery and saw some great works there. Here are some of my favorite.
The walk by the Thames River was very nice too, love the bridges & brick buildings.