2000+ year old computer. Recreated with Lego

The Antikythera Mechanism is the oldest known scientific computer, built in Greece at around 100 BCE.

Lost for 2000 years, it was recovered from a shipwreck in 1901. But not until a century later was its purpose understood: an astronomical clock that determines the positions of celestial bodies with extraordinary precision.

In 2010, this fully-functional replica was built out of Lego by an Apple Engineer.

Read more about it here.