…standing in the middle of somewhere, where all you see is the flat horizon extending 360 degrees from your point of view?

what would be the sensation of being in the middle of the ocean or the very flat desert? would it differ if it’s twilight, sunrise, in the middle of the day, sunset, or the middle of the night? would it differ if you’re standing or sitting down on the ground, or afloat on the water?

would it be the same if you’re under the deep waters of the ocean, where all you see is the dark waters?

would it be the same if you’re the only person left on earth?