The Isles of the Blest (or the Fortunate Isles) are a group of three paradise islands in the center of Elysium. It is reserved for those who, upon entering the Underworld, are judged and return to Elysium three times in a row after being reborn.
They are thought to be the equivalent of islands on the western edge of the Earth, with continuous sunlight. Very few people make it to the Isles, as many prefer eternal residence in the pleasant Elysium to risking rebirth and ending up in Asphodel or the Fields of Punishment at the end of another life.
The Isles of the Blest were described as Caribbean-type private islands in a lake in the middle of Elysium, the place where souls who lived three virtuous lives in a row could retire to after their third death. However, it was also revealed that not many souls managed to accomplish this, for it was like "winning the Good Person Powerball Lottery".
While in the Underworld, Percy Jackson noted that the Isles of the Blest was separated from the rest of Elysium by a glittering blue lake, and seemed like a vacation resort in the Bahamas, and he immediately knew that it was where he wanted to go when he died. Annabeth Chase also acknowledged the incredible appeal of the Isles of the Blest, stating it as the place for heroes.
According to Percy's observations, very few people manage to achieve the feat of being a resident of the Isles of the Blest. Luke Castellan was supposedly going to choose to be reborn, in order to get to the Isles of the Blest, but it remained uncertain as to whether he really choose rebirth over eternal residence in Elysium.
|Underworld:||Chaos | DOA Recording Studios | Doors of Death | Door of Orpheus | Elysium | Erebos | Fields of Asphodel | Fields of Punishment | Hades' Palace | Isles of the Blest | Judgment Pavilion | Persephone's Garden | River Lethe | River Styx | River Acheron | River Phlegethon | River Cocytus|
|Tartarus:||The Mansion of Night | Hermes' Shrine | Chaos|