El Nido is the name given to the archipelago situated in a sea encircled by rocks far from the Zenan mainland. Originally, it was simply a sea; no islands existed within the sea save for Gaea's Navel. After 2300 AD, Belthasar located Chronopolis there and constructed the time fortress under the wing of the Central Regime. Specifically, it was built in a subsection of the sea known as the Sea of Eden. There, Project Kid was developed and the FATE supercomputer was constructed and powered by the Frozen Flame. In 2400 A.D., the Time Crash hurled Chronopolis ten thousand years into the past. FATE, desirous of creating its own paradise, began the process of terraforming several new islands in the sea.