June challenge, leading lines

[Chris Sawyer]

Keith,

It's a bit of an optical illusion.  How much higher is the track on the right than the track on the left?

[Chris Sawyer]

Ian,

I have been trying to work out what dock that is, but to no avail.  

[Keith Woonton]

Hi Chris,
As I recall, the top wall was about 3 to 4 feet above the lower breakwater. As a foot note I flipped this image left to right as it seemed to visually read better this way around.

[Ian Stedman]

Chris,
The photo was taken from the royal Victoria Dock footbridge. That's a good viewpoint for Canary wharf.

Ian

[JanGilkes]

We have already seen a version of this last season but thought it was good for this challenge.