The infinite tunnels pull us in with their symmetry. The ceiling lights guide our eyes to the horizon. The tiles and posters form patterns that please the eye. The echoes of rushing crowds, a flickering light, a train zooming by.
Further reading: Subterranean London.Next: Sub City Paris / Sub City New York, The Archaeology of Crossrail and the history of London, and How does a tunnel boring machine work?
via The Awesomer.