Nilai-Kanai Temple

The Nilai-Kanai Temple is the centre of the Atlantean civilisation. It first appears in Rebirth of Mothra II.

Rebirth of Mothra II
Before Humans evolved, the Atlanteans ruled the earth, with their monarchy inhabiting the South-Pacific temple. In order to control the pollution their luxuriant civilisation created, the Atlanteans created Dagahra, who consumed the pollution and cleansed the waters. Unfortunately, something went wrong, and Dagahra became uncontrollable, spawning thousands of Barems and killing off all but a few of the Atlanteans, who continued to live in the temple.

After Mothra Leo comes to the temple to fend off Dagahra, who had become reawakened and sought out the temple, It was revealed that Princess Yuna, one of the last surviving descendants of the Atlanteans, knew where the Atlantean treasure, the Ghogo, lay. It was deep within the temple. While the Elias and a group of Japanese kids searched the temple, Yuna commanded the temple's Guardian towers to fight off Dagahra, as Mothra Leo was injured and being poisoned by the Barem.

Later, after Mothra Leo had transformed twice, first into Rainbow Mothra, then into Aqua Mothra, and managed to defeat Dagahra, Yuna levitated the dead monster's corpse over the temple, and dropped it, causing the temple to collapse deep beneath the waves, leaving her fate unknown.