The Zohar describes Gehenna as a place where the souls of the wicked are tormented by angels of destruction. These angels wield fiery whips and inflict excruciating pain on the souls, who are forced to relive their sins and suffer the consequences of their actions. The Zohar also mentions that Gehenna has different levels, each with its own unique form of punishment. The severity of the punishment depends on the nature and extent of the sins committed during one's lifetime.