That designation is usually given to Tibet, because it has the tallest mountains.
Tibet and the Tibetan Plateau
Yes, it is called a ceiling
Nepal is often referred to as the "roof of the world" because it is home to the highest mountain on Earth, Mount Everest. Nepal's mountainous terrain and numerous peaks over 8,000 meters contribute to this nickname.
The end of a triangular roof is called a gable edge or end.
it is called a roof
roof is roof. It's the same.
The roof
The roof of the world - Nepal
The roof of the cavity is called the "dorsal surface."
A country that is a 'friend' of another country is called an ally.
Roof
It is what you called the planning for the roof.