I posted about the incredible Corpus Clock back in 2008, but at the time I wasn't able to find a video to embed for you here. As you can now see, that has changed!
The Corpus Clock, created Dr. John Taylor, was commissioned to honor the John Harrison, the clock maker who built the first truly reliable sea clock, thus solving the problem of determining longitude at sea. For more on this fascinating story check out Dava Sobel's book, Longitude. Harrison was also the inventor of a clock mechanism known as a grasshopper escapement, which is used (quite literally) in the Corpus Clock.
For more information about the Corpus Clock check out http://www.corpusclock.co.uk.[ Thanks Thomas! ]