The Asphodel Arboretum was an arboretum in Aletheia's simulation of Elysium. Located in the western tip of the Asphodel Fields, it, as the name suggests, was in use as a botanical garden for trees and was heavily guarded. The location also had a Ainigmata Ostraka.
During the Peloponnesian War, the misthios Kassandra explored the area, killing the captain, destroying a torch of Hypnos, and claiming their valuables. At the same time, she also recovered an Ainigmata Ostraka.