Manchester man, Marc Gawley, has visited all 270 London Underground stations in under 17 hours, setting a new world record.
The challenge has strict rules and is verified by the Guinness book of records. Marc, who has a physics degree from Oxford University, completed his tube day tour in 16 hours, 29 minutes and 57 seconds.
33 year old Marc is a management consultant and used his skills, both managerial and mathematical, to work out the shortest and fastest route. He had to call at every station, so long as the train stops, it counts.
The Tube Challenge started back in 1959.
Marc slashed 15 minutes off the previous record. On the journey he made videos showing times and stations signs.