While most clocks help us keep time on the day-to-day, the 10,000 Year Clock is focusing on the much, much bigger picture.
Currently being built into the side of the Sierra Diablo mountain in West Texas, the 10,000 Year Clock will ring a bell once a day. In addition, its five chambers will celebrate the clock's future anniversaries, marking its first year, as well as its 10, 100, 1,000, and 10,000-year anniversaries by opening up to reveal a unique animation, although they've only designed the first two so far. They'll leave the rest for future generations. (Probably for the best — that'll keep it from getting stale.)
Think it'll still be around and relevant in the year 12,011? Or, more importantly, will humans be? There's no completion date for the clock — the project could take years, even.