[Talisker]

Well when someone shows me how to quarry, move, float, host and place thousands of 10 - 50 ton basalt logs quarried, lifted and transported from islands, across the ocean, and into precise elevated placement at the site using stone age technology, I’ll stop thinking the natives are telling the truth when they say they didn’t do it. Because to me, a flying machine with a hot exhaust is exactly what one of these natives would call a dragon. And those stones are so heavy they’d make assembly even today staggeringly difficult, if not impossible. That’s just a fact. To me, that’s called a mystery, but I’m easy.

[SunkenCiv]

You're not easy, LAZ is the easy one around here, or so I've heard. Y'know, from Laz...

Nan Madol isn't off by itself in the ocean, it was built on coral reefs that were barely submerged. Obviously, this happened before there were environmental impact statements and such:

Nan Madol

The ruins of Leluh are right on an island.