If you were to fly north from New York City, across Canada directly to the Earth's physical North Pole, then kept going straight... you'd end up somewhere in Russia, right? Not necessarily, say those who believe the Earth is hollow. Why? Because there's a big gaping hole at the North Pole, they allege, and if you'd fly (or walk, for that matter) across the pole, you'd find yourself entering the interior of the planet. Read more.