I do remember being surprised when I visited the U.K. over how difficult it would be to navigate most places - particularly public transportation, but also many stores had doorsills that wouldn't have been possible to pass in a chair.

I also noticed there seemed to be very little Braille around and no real standardization for where it would be put. Although what Braille I did encounter was correct, which can't be said of the U.S. (In many places it's actually dangerously wrong - like directing a person to walk into oncoming traffic wrong.)

But I also saw people helping parents with strollers quite a lot, and often without having to be asked. That was nice to see.