Narak

Narak, among the Hindus and the Buddhists, is the place of penal suffering after death. In Hindu mythology, sinners are sent to Narak to undergo punishment for their sins committed on earth. Narak is divided into twenty-one divisions.

Srimad Bhagvadgita says that there are three doors to Narak - Kam (sexing up oneself, or the feeling aroused in a person to gratify an urge originated from desire), Krodh (anger) and Lobh (greed).

Narak, the son of Anrit

In Hindu mythology, one Narak was a son of Anrit by his sister and wife Nikriti. He was the grandson of Adharm and his wife Hinsa. Narak had one brother and two sisters. His brother's name was Bhay and his sisters names were Maya and Vedna.

see also Hell
Compare it to Svarg, or Heaven.