When I was a kid, I remember grown-ups joking that any deep hole (that I was digging in a sandbox, perhaps) would go "straight down to China." They were wrong, of course, and today you can answer the same question online with Antipodes Map.
Tagged With geography
If you're a news hound, there are plenty of apps and services out there to help you keep tabs on what's going on around the world. Heatmap News does just that, with an added bonus: it maps out exactly where that news is happening.