This seems somewhat common:

I was in Germany years ago talking with an acquaintance about traveling. She mentioned that she and her family were going to spend three days in the US and planned to see Hollywood, the Grand Canyon, NYC and Florida in that time.

I explained as gently as I could that those places were thousands of miles apart and while it might be just barely remotely possible to visit all those locales in three calendar days, they’d be doing nothing but travel the entire time and see absolutely nothing in any of their chosen destinations. She said she didn’t realize the US was so enormous and they’d look into making other plans. (Maybe I averted a ruined vacation?)