A ruined temple complex on a small island northwest of the main archipelago, visible only at low tide. The stone architecture predates the Alekroin settlement by unknown millennia—the construction style matches no known civilization, and the carvings depict creatures that do not exist in any bestiary.
The Alekroin consider Thizun taboo. Not from fear, exactly—they simply do not go there, following a custom so old that no one remembers its origin. When asked, they say only that "the old ones told us not to." Whether this refers to their ancestors or something else entirely remains unclear.
Treasure hunters occasionally attempt to explore the ruins. Some return with strange artifacts—geometric stones that hum faintly, metal tablets inscribed with unknown scripts. Most don't return at all. The Alekroin do not interfere with these expeditions. They also do not help.
Rumors persist of something that moves in the submerged chambers when the tide rises. The Alekroin do not confirm or deny these stories. They simply don't discuss Thizun at all.