What country are you in? In Ireland there was a tax funded program that established many outdoor sculptures of value (and, of course, some of no value). Yet there were no funds to publicize their location, so one came upon them by accident usually. I...
I do not know London well enough to answer this, however I have ordered a toy or two from Sam (Tesselate) at tessletoys. perhaps you could look there for ideas.
Visit some buddist temples especially the temple of the golden Budda and the teple of the reclineing Budda. Check out the imperial palace it is awsome