
A 2,000-year-old geared computer, found by sponge divers in 1900
Sponge divers sheltering from a storm in 1900 found a Roman-era wreck off this small Greek island, and the salvage produced bronze and marble statues, glass, jewellery and a corroded lump of gears. That lump was the Antikythera mechanism: a geared analogue computer, built around the 2nd century BC, that modelled the sun, moon and planets and predicted eclipses. Nothing of comparable complexity appears again for well over a thousand years. Divers are still working the site and still recovering material. The mechanism is in the National Archaeological Museum in Athens.
Antikythera (Greece)
See it on the map
Other places on the map within a couple of hours of here.