The spread of London planetrees at Hyde Park.
Allees, malls, and other linear arrangements of trees (also taken in Hyde Park).
Lovely utility access covers.
Mews and alleys to shorten your journey or to bypass busy roads.
Creative, adventurous playgrounds.
So many private squares -- nice to look at though but even better if you have a key...
Gorgeous architecture! This photograph of the original Natural History Museum (entry is free).
Thoughtful historic preservation, at the V&A Museum (also free entry): "The damage to these walls is the result of enemy bombing during the blitz of the Second World War 1939-1945 and is left as a memorial to the enduring values of this great museum in a time of conflict."