[SunkenCiv]

[Mr. K]

There was too much weight from all those statues and it tipped over

[Jan_Sobieski]

Definitely Global Warming, exacerbated by cow flatulence...

[Boogieman]

Well, they still deforested the place, at least. Can’t blame the Europeans for that.

[MUDDOG]

So it didn't collapse in a Lord of the Flies nightmare?

Another good story bites the dust, like "Travels with Charley."

[left that other site]

Obviously.

Aliens.

[Abathar]

You can never rule out a Jerry Jones type event as well. The simple fact is that without any written accounts we will never really know for sure the whats or whys, forever to be a mystery.