We toured the then-tallest building in the world, the Taipei 101 office tower last June. The top of which is a giant damper that sways to counter-act any movement of the building in the event of an earthquake, pretty common in Taiwan.
The attached article explains this in better detail, but check out the video of the damper in action during the recent Sechuan earthquake. Pretty exciting stuff, but hey - it worked!
Finally, a link to the article on Gizmodo that explains how this whole system works