There is a photo contest by 
Every week on Sunday a new round starts and the motto is announced.
To participate, you have to publish a post according to the theme, then leave a comment and a link in the contestpost and use the tag #pobphotocontest.
There are POB tokens to be won, which will be distributed as rewards for the published post.
Also 
So it's worth joining in there.
This week's theme is Bridge and here is my contribution.
When we was in London, we came to the Millenium Bridge there. we have made a good photo under the bridge. Here it is.
I love it, because this bridge is just made for walking above it. There are no cars on the bridge. Fantastic.
Of course, we have a photo from the Tower Bridge as well, but everyone know the Tower Bridge. So my entry for this contest will be the Millenium Bridge.