Commuters will get a taste of culture on a journey to a Harrow tube station.
As reported in the Observer in March, travellers can now complete cryptic crosswords to discover the secrets of Stanmore.
Art and crosswords have been on dis-play at Stanmore Station since Tuesday.
Artist Serena Korda, from Dollis Hill, was charged with creating the banners displaying the eight completed cross-words in the station entrance hall.
She said: "I'm very excited to see it all come together. It is the culmination of a lot of hard work. I'm not the best at cross-words so I had a lot of help from a cross-word group and professionals."
Passengers can pick up puzzle booklets from stations on the Jubilee Line to complete as they go about their daily commute before hopping off the train at Stanmore to get the solutions.
The project was inspired by the area's links with Britain's Second World War code breakers at Bletchley Park, an out-post of which was based on the corner of London Road, Stanmore, in 1942.
The art aims to take the public on a journey into the history of the area.