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July 8 (UPI) -- A group of eight British teenagers took their enthusiasm for public transportation to the extreme and broke a Guinness World Record by riding the London Underground.
The teenagers, ages 16-17, visited all 272 London Underground stations with a time of 18 hours, 8 minutes and 13 seconds.
The group, who call themselves the The Amersham Ambushers, where required to visit every London Underground stop using only public transportation.
They had attempted what they called "The London Tube Challenge" twice before, but only found success on their third try.