(via SourceFed) The Antikythera mechanism is a device that was found in the ocean, which seems to have been made in Greece around 100 BCE. It was the first computer, a calendar, an astronomical device, and predates equivalent technology by thousands of years.
Michael Wright, a former curator of the Science Museum in London, has built one.
This isn't the first time I've ever heard of the Antikythera mechanism -- I've known about it for years, and ever since I first heard someone was trying to re-create it (it might have been this same guy) I've wanted one. I doubt I'll get one soon, if ever, but it's easily one of the coolest objects I'm aware exists.
So, if anyone's got a spare Antikythera mechanism they don't want, and feel like passing it on to a blogger, I'm totally willing to take it off your hands.