If I didn't know what a British zebra crossing was, I would probably picture a scene out of a TV nature documentary
US crosswalks, at least in places I've been, are usually white stripes on the black/gray pavement; they don't remind me of a zebra at all....
Actually I just used Google images for "crosswalk" and for "zebra crossing" and the pictures it pulled up for each looked similar.
Two British/American differences which often trip me up, even though I know what the British meaning is:
1. Pavement - as an American I see "pavement" and think of a road; when I read that someone is walking on the pavement I expect them to get hit by a car, until I remind myself that it's the British equivalent of a US "sidewalk"
2. Call - I'm surprised when someone goes to make a call and they start observing the other person's surroundings; in American usage a call is typically a telephone call, not a personal visit