Ankara's mayor is being sued for building a giant robot

There's just no pleasing some people.

Slum tourism, Johnny Marr on modernism, and the never-ending bridge paintjob

Other cool stuff we found this week.

General Election 2015: What do the manifestos promise for London?

We read them so you don’t have to.

What exactly is self-cleaning concrete, and how does it work?

Photocatalysis, obvs.

Britain's transport police want you to text them if you're harassed on the tube

Also, they've released terrifying video.

Why has Generation Rent walked out of the Homes for Britain campaign?

It was all going so well.