Two pedestrians cross the cobbled Rua Sa da Bandeira, followed closely by a pair of Segway riding tourists, on 21st July, in Porto, Portugal. Segway tours have become controversial additions to the European city sightseeing scene, already being banned in Barcelona and Prague. But in Portuguese cities like Lisbon and Porto, Segway travellers still share narrow and busy streets and often, pavements, with locals on foot. (Photo by Richard Baker / In Pictures via Getty Images)
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