Fields of Asphodel

The Fields of Asphodel (also known as the Asphodel Meadows) is a section in the Underworld where indifferent and ordinary souls who lived a life of neither good or evil are sent to live after death. It is said that after his death, Daedalus was assigned to create roads and overpasses in the Fields of Asphodel, to ease the traffic.

Description
The Asphodel Meadows is the realm of neutrality where the souls of people who are neither good nor evil go. The majority of all souls go here.

It is said that all souls that are neutral are to drink from the River Lethe before entering the fields, thus losing their identities and memories, thus becoming something similar to a machine. The fields are a somewhat negative outlook on the afterlife for those who make little impact during their lives.

Neutral souls go there if they choose to go through the "EZ Death" train line at the gates to the Underworld, instead of accepting judgement. It is sometimes said that it was a plain of Asphodel flowers, which were a favorite food of the dead in Greece.

The Lightning Thief
The Fields of Asphodel are first seen while Percy Jackson was on a quest to rescue his mother and retrieve Zeus' Master Bolt. The realm was filled with the souls of the neutral people. It also seems like 'a never ending field in Kansas', according to Grover. It is very dark, there is little noise, no light, black grass, stunted black poplar trees, and some fallen stalagmites.

When Percy sees the field, he considers it to be very depressing. He sees it as a field packed with people, but there is no electricity, no noise, no light, no beach ball over the crowd, and the millions of people in the crowd "are just milling around for a concert that will never start."

The Sword of Hades
When Percy, Thalia, and Nico go to find Hades' stolen sword, they walk through the Fields of Asphodel. Nico uses his sword to clear a path through the shades.

The Battle of the Labyrinth
Daedalus was asked to build a road at the Fields of Asphodel so it would prevent Underworld traffic.

The Son of Neptune
When Hazel has a flashback to when she sacrificed herself to prevent Alcyoneus from rising, she was placed before the judges, who were going to send her to Elysium and her mother to the Fields of Punishment. Hazel didn't think this was fair, so the judges modified the punishment and sent them both to the Fields of Asphodel. While Hazel remembered who she was, her mother most likely didn't, and Hazel never saw her again. Nico eventually found Hazel sitting next to a poplar tree while looking for his sister, Bianca, but she had been reborn, so Nico took Hazel out of the fields and to Camp Jupiter. Frank shared this flashback with Hazel and it is here that he gives Hazel his burned stick that is connected to his life.