H. P. Blavatsky

Pâtâla. The nether world, the antipodes; hence in popular superstition the infernal regions, and philosophically the two Americas, which are antipodal to India. Also, the South Pole as standing opposite to Meru, the North Pole.

Source: H. P. Blavatsky, The Theosophical Glossary, art. Patala