Posted this elsewhere as getting used to posting here. Q posted an image of the Capitol from above that showed an image of an owl (in red outline). Here is another location that has an owl, though not as perfect (St Peters Sq, Vatican City):
Since you mentioned it I went to the obvious place and found this - Buckingham Palace. Not as clear as the one in D.C or Vatican City but it has very similar features with a memorial in the round part (Victoria Memorial). All three locations have a high point in the round area of the 'Owl'. In D.C it is the Statue of Freedom, in the UK it is an angel of some sort, in Vatican City it is a cross.