Duration: 2.27

Concrete anti-terror blocks – also known internationally as Jersey barriers or K-rails – are an increasingly common sight around the world following attacks using vehicles as weapons in locations such as London, Barcelona and Nice.

Now Danish urban gardner Mads Boserup Lauritsen, who works in Copenhagen, is turning the ugly blocks into a green alternative includes benches, plants, bike racks and even a children’s climbing wall.

This film, originally published on 26 October 2017 on bbc.co.uk and screened on BBC World News TV channel, that day became one of the Top Video Stories on the BBC News website.