[SunkenCiv]

Aerial view of Keeladi, India

Tamil Nadu Department of Archaeology

[ProtectOurFreedom]

2,600 year old tech is still widely used today, too! I remember Dad installing the stuff to drain downspout water away from the house long ago.

[Getready]

Another example of the innate engineering intelligence of mankind regardless of historical era...possibly on the wane nowadays(Boeing, collapsing bridges, Millenium tower in San fran..California bullet train fiasco, etc)?????