The Mariana Trench is so deep that if Mount Everest were placed at the bottom, its peak would still be over a mile underwater.

The Earth's crust is thinner beneath oceans.

The Great Wall of China is not visible from space with the naked eye — it's too narrow relative to its length.

Mount Everest is not the closest point to space — due to Earth's equatorial bulge, Mount Chimborazo in Ecuador is actually closest to the stars.

Nan Madol is an ancient city built on artificial islets in Micronesia.

The Himalayas continue to rise due to tectonic movement.

The 2019–2020 Australian bushfires burned millions of acres.

There are caves on Earth so deep they have their own weather systems.

There are abandoned cities hidden around the world that were evacuated suddenly.