Throw your clock widget and use this London live wallpaper featuring Big Ben instead. In the full version the clock shows the real time and the sky, sun, moon and clouds move and change color according to the time as well.

In the free trial version the time is fixed, but the clouds still move and the birds fly.

Flickr contributors:

Big Ben: Vicente Villamón
Moon: Luis Argerich

Thanks for the creative commons licenses!