The 'London Underline' project by US-based Gensler, which has already won the 'Best Conceptual Projects at the London Planning Awards, is a new way for Londoners and tourists to get around the city – all through its new pathways in old London underground tunnels, which will also be lined with cafes. 

Pre-existing tunnels which will play a major role in the new project include the defunct branch of the Piccadilly Line and a deserted part of the Jubilee Line. There will also be smaller stretches at Goodge Street in the centre of the British capital and Stockwell in South London.

To avoid criticism for being financially unstable, Gensler has even included kinetic paving to run throughout the safe tunnels and the rest of the city. 

Design Firm Gensler Proposes Cycle Paths in London's Abandoned Underground Tunnels