StreetMuseum
I love this new iPhone app called streetmuseum http://bit.ly/afDZ8d, which allows you to view key areas of London that have been captured in historical art. The picture overlays what you're seeing with a piece of art and you can choose to get a more detailed piece on one you are looking at.
This is a great initiative by the Museum of London.
Read more about it here http://bit.ly/c62ic3
