What's in your puddle?

I found the Victoria Tower, from the Palace of Westminster, in mine.

It was a relatively quiet day at work, so I decided to pop out at lunchtime for a short stroll. There were numerous Blipping opportunities, all of which I missed: there was the slim, trim, photogenic young lady runner, breezing along (she happened to have only one arm); the old green single-decker bus from which sashayed a bride and her entourage; and a queue of tourists waiting to take the best shot of the Palace of Westminster - all of whom ignored my puddle.