I took a fair few photos on our travels (well, quite a fair few to be honest) and here are a couple of shadow shots which bring back happy memories.
This one was taken from a window at Hampton Court Palace on a fairly hot day.
This one was taken at the foot of the Eiffel Tower on a fairly cold day.

But this one of my clever Egyptian friend in the Louvre is my favourite. See how he's made a dog head wall shadow - what a guy.

This final shot has nothing at all to do with shadows, but I thought you'd like to see this gorgeous young Italian waiter in Florence who didn't lift a finger all night - he simply stood there and the young women flocked into the restaurant. Nice.