Er'Astia¶
Er'Astia is a land of ruins that the archive files as a fragment of Astia. The Fifth Age knows it only through a portal: among the twelve anchored destinations given to a Sancturi-era company in 704 SM was "Er'Astia Hightown (ruins)" (S191), and what they found there was "a city on a slope" (S192). The older archive adds one place beneath the land, the Well of Stars, and one treasure hidden somewhere in it, the Ring of Water of the Mithis Heartstone (S182).
Hightown¶
The company stepped out onto a slope of ruins. They found "a dusty skull" in "rusty chain armor" wearing a brooch of a spear with wings spread on either side of the shaft, "ruins of a Kalari temple" whose walls were "reduced" to five feet, and, above the dead city, "floating rock" (S192). That a temple of the Kalari stood here is the only hint of who built Hightown.
The Ring of Water¶
Among the parts of the Mithis Heartstone, each tied to a god, the Sancturi campaign's notes list "Ring of Water (Achelus ... Hidden in Er'Astia" (S182).
The Well of Stars¶
"The Well of Stars is a shrine of Arya built over ancient Dwarrow ruins. It's underground, accessible only through a river cave" (S523). Over it stands a temple complex of Moros, whose followers "were victorious over the Aryan faction in a great battle for the area. Afterwards, the tunnel was turned into a holy place where high priests of Moros would travel to die. Once inside, they were killed by Aryan guardians" (S523).
The Dwarrow site "had been a protected place where the injured and sick had gone to be treated. Since then, the rejuvenation pool has flooded several wings. However, the dwarrow machines that operate it are still functional, despite the fact that they're underwater" (S523). The well itself is "a ruined shrine built by Aryan acolytes. The statue of Arya has fallen over and some of the stonework over the dwarrow site has crumbled, revealing the smooth, metallic dwarrow walls" (S523). The temple above "is inhabited by the descendants of extremist worshippers who believed in cannibalism. It was the highest honor to be eaten by others" (S523). The 2014 text (S450) says the same.
Gap
No source says where Er'Astia lies, who built Hightown, or whether anyone lives there now. The compendium's lists of Astia's fragments name Urastia and not Er'Astia; whether they are the same land is not stated.