Fields of Punishment

The Fields of Punishment is a place in the Underworld, where mortals are punished for horrible deeds, using a variety of horrible torturous methods.

History
The Fields of Punishment are where people who were evil during their lives face eternal punishments for their crimes. Usually the wicked would be condemned to Tartarus in Greek Mythology; but, in this series, they are sentenced here instead. Percy Jackson says he saw people chased by Hellhounds, burned at the stake, forced to run naked in cactus patches, listen to opera music, and other things he didn't want to imagine. It can be described as, "Imagine your worst fear. Now imagine it being ten times worse. Now imagine living that fear forever."

The Lightning Thief
Percy Jackson views the Fields of Punishment while he is in the Underworld.

Later, when his quest is over, he wonders whether he has the right to send Gabe Ugliano there. He also notes that he saw the spirit of an "annoying" televangelist going to the Fields of Punishment while being surrounded by security ghouls.

The Sea of Monsters
The Fields of Punishment are not seen, but Tantalus is brought to Camp Half-Blood from there. Tantalus was cursed by standing in a pond and a fruit tree hanging over him, but he could never eat or drink as the fruit and water would move out of reach from him when he tried to eat or drink it. The same curse applies to him anywhere else until it was removed by Dionysus before Tantalus disappeared back to the Fields of Punishment, where the punishment resumed in the Underworld.

The Sword of Hades
Percy Jackson, Thalia Grace, and Nico di Angelo travel to the Fields of Punishment to question Sisyphus who has the punishment of moving a boulder to the top of a hill which would always roll back down the hill, thus the punishment would never be completed.

The Son of Neptune
After Hazel Levesque used her power over the earth to delay the rebirth of Alcyoneus in 1942, killing herself and her mother, Marie Levesque, in the process. Marie was initially condemned to the Fields of Punishment, while Hazel would enter Elysium. However, Hazel persuaded the judges to split the blame for Marie's evil actions between them, and both souls were sent to the Fields of Asphodel instead.

Appearance
Leading up to it is a rocky path where you can see it glowing and smoking. It's a cracked wasteland, has rivers of lava, minefields and barbed wire separating the different torture areas, and screams and 1980s music can also be heard. In addition, there are cactus patches, and any other 'new ideas' Hades wants to try.