A gloomy underground shopping and transit centre in Paris called Les Halles has been given a 1 billion euro face-lift. The centrepiece is an airport-sized undulating roof but it'll be another couple of years before the entire project is complete.

Paris-Les Halles: Unveiling of 1 billion euro revamp of metro, shopping complex

A gloomy underground shopping and transit centre in Paris called Les Halles has been given a 1 billion euro face-lift. The centrepiece is an airport-sized undulating roof but it'll be another couple of years before the entire project is complete.