Purgatory (also known as Limbo) is the middle ground between Heaven and Hell. Souls who sinned but are not truly evil go there.
History
Arrowverse
Purgatory was the realm where souls became trapped in their own hell, so the realm is visually different for each resident. During the Crisis on Infinite Earths, the Spectre came to Purgatory to convince the late Oliver Queen to become himself a new host of the Spectre Entity.[1][2][3]
Points of Interest
Residents
Known