rixx, 6 months ago

The Tunnel of Eupalinos was built in the 6th century BCE in Greece. It's just over 1km long, goes through a mountain, and was built from both sides.

And! It was built as an aqueduct, so it has two parts; a footpath and a lower water channel. It was in use for a thousand years before the channel silted over.

AND! It still exists and can be visited and we mostly know about it and rediscovered it due to Herodotus mentioning it. How cool is this?? https://en.wikipedia.org/wiki/Tunnel_of_Eupalinos

#til #civilengineering

Cross-section schematic of the tunnel: the upper part is the tunnel and footpath, with a narrow shaft/hole at the right hand side leading down to a water pipe, which is roughly half as wide as the tunnel.

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