The quickest way to become a massively ridiculed cliché tourist in any European town is to take one of those Segway tours. My god I would never set foot on one of them, it's just so embarrassing.
Hmm, I never even give a second glance to people taking the Segway tours in my city (Chicago). But whenever I see one in my neighborhood, 7 miles from downtown, hoo boy is it hard to not stare.