Earth is torus-shaped and partially hollow with openings to the inside on both north and south poles.
At the north pole an ocean flows inwards, to the inside of the Earth and you won't see it from the perspective of a boat or plane due to scale, because of how huge it is, it's hundreds and hundreds of miles in circumference. You would have to be partially inside to notice it by looking upwards and you would see ocean's water and the farther you would go, the less and less sky and more water over your head until you go to the other side and will start seeing less and less water over your head and more and more inner atmosphere "sky".
There is a reason why millions of animals migrate towards the north when cold and why there are aurora borealis and why colorful pollen can be found on snow and ice in the Arctic and why frozen animals and plants can be found in fresh-water glaciers in the north pole. They come from the inside.
Electromagnetic field affects the size of an organism, that's why there is a phenomenon called "polar gigantism" where genetically same organisms grow bigger in weaker electromagnetic fields, compared to their counterparts living in normal electromagnetic field and that's due to Earth being partly hollow and its openings to the inside on both poles, which makes it torus-shaped and that's why electromagnetic field is weaker at poles and the reason for why planes nor satellites fly over poles.
Mountains and oceans found INSIDE the Earth, because it's partly hollow and torus is not a perfect ball, that's why it's possible in certain places to have a long flat land and due to scale you won't notice its torus shape from the altitude of these balloons with cameras mounted on them.