Obelisk - Final Fantasy XVI Database

In-game Description

Ancient relics found across Valisthea. Their construction closely resembles the “airships” of the Fallen, but unlike them, they do not appear to have fallen from the sky, rather to have stood in place since time immemorial. They illuminate when Clive approaches—though for what reason, it is unknown. After once being lit, they continue to shine with the same blue glow night and day, making them ideal for use as waypoints.