Which valley is known as the “Roof of the world”?

Which valley is known as the “Roof of the world”?

کون سی وادی "دنیا کی چھت" کے نام سے جانی جاتی ہے؟
Explanation

Baltistan valley is known as Roof of the world

Baltistan  is located near the Karakoram mountains just south of K2.