Water level.
Plenty more from the shore and even on the water. But I'm sure you know this.
It doesn't matter about just one place on Earth. It'll happen with tall buildings, anywhere. It'll also happen with smaller buildings, depending on the weather.
It's pretty clear as all hell the Earth is absolutely not a globe we walk upon and certainly not a spinning one.
Of course, depending on the weather.
Not sure what you're trying to get at.
Are you saying standing behind a small hill blocks your sight to a mountain behind that hill?
If you are you might as well have said standing outside your house wall at the back stops you seeing your neighbours over the road at the front.
Unless you want to clarify what you're getting at.
It does.
On a cold crisp clear day the atmosphere isn't agitating anywhere near as much and is more dense. It can actually massively magnify objects in your view.
And it's got nothing to do with less moisture,.
Yep, as I said above.
When you're raised above sea level your view is through much less denser atmosphere than if you were stood at the shore.
This happens whether it's hot or cold.
Your little people are looking down, not horizontally level.
Have them looking horizontally level and see what happens.