I submitted a puzzle of my own making:
If the world were flat, would I always be able to see Mount Everest (the tallest structure) off in the distance?
In my mind, there is only one "correct" solution to the puzzle.
However, as I did not place enough restrictions on the puzzle that I thought were obvious ("You have to look towards Mt. Everest", "You are not blind", "You are outdoors", etc), several other answers were added which were not intended. I'm assuming it is for this reason that the puzzle has been put on hold as "too broad":
There are either too many possible answers, or good answers would be too long for this format.
I disagree with the question being flagged as "too broad"; I feel it is a fault of the answers, not a fault of the question.
As it seems to be the pattern on this site, after the "correct answer" has been given, rather than post duplicates of the same answer, what you often get is a steady stream of "lateral thinking" solutions to what is not a lateral thinking problem.
So long as they are clever, I don't mind a few lateral thinking answers, but I feel they should be posted as comments rather than answers.