Patala

In Indian religions, Patala or Patal (Sanskrit:पाताल, Pātāla) denotes the subterranean realms of the universe - which are located under the earth. Patala is often translated as underworld or netherworld.
In Hindu cosmology, the universe is divided into the three worlds: svarga (the upper regions), Prithvi (earth) and Patala (the underworld). Patala is composed of seven regions or lokas, the seventh and lowest of them is also called Patala or Naga-loka, the region of the Nagas. The Danavas (demon sons of Danu), Daityas (demon sons of Diti), Yakshas and the snake-people Nagas live in the realms of Patala.