This title has two meanings. Even that sentence has is a semi-pun. This bridge is the most famous in London. So famous that most tourists call it London Bridge. In fact, London Bridge is further down the river and far, far less picturesque.

This is in fact Tower Bridge. The middle of this bridge raises up into two halves to let tall ships pass through, hence the name.

The other ‘halves’ that I was referring to was the sky; red on one side and blue on the other. This is the one of the sharpest distinctions I’ve been between sunset and blue hour in the same sky. I guess the cloud layout helps a great deal with this.

The hi.co compression has hit this photo hard. Here’s a sharper one.