How much it costs to rent in Berlin – mapped by its metro stations

City links: An unusual Berlin property map, Rotterdam's floating forest and the fate of Delhi's metro all feature in this week's roundup of the best urban stories

This week's stories range from a map tool that lets Berlin renters see if their landlord is illegally overcharging them to plans for Singapore's new non-High Line and the role of sound in architecture. We'd love to read about your favourites too: share them in the comments below.