3,399 Feet Through Rock - This Tunnel Should Have Missed

Two crews entered opposite sides of Mount Kastro on Samos, cutting by hand through 3,399 feet of limestone.

They had no lasers, no engines, and no modern surveying instruments. If their tunnel lines drifted by only a few meters, the aqueduct failed completely.

This episode reconstructs the Tunnel of Eupalinos: the ancient geometry, sight lines, plumb bobs, measuring cords, correction strategy, and dog-leg tunnel design that allowed one of antiquity's most dangerous engineering problems to survive being wrong.

A lost machine does not always look like bronze gears or giant stones. Sometimes it is a system of marks, cords, lamps, and human trust inside a mountain.

00:00 Two crews enter the mountain
01:05 Why Samos needed a hidden water tunnel
02:20 The danger of two lines that never meet
03:45 How ancient surveyors carried a line over rock
05:10 The lost sighting method
06:35 Keeping alignment alive underground
08:15 Bad ground and the dog-leg solution
10:05 The breakthrough inside Mount Kastro
11:15 Water, clay pipes, and what vanished

Видео 3,399 Feet Through Rock - This Tunnel Should Have Missed канала Lost Engineers