Another fun tool is one that can end discussions about where you would end up if you dug straight down through the earth. One would then end up at the antipodes, the place on earth diametrically opposite to it. The antipodes map show exactly this. From most places one would end up in an ocean, but for Europe one could start from Spain and Portugal and be lucky to end up in New Zealand. This clearly shows how much of the world is covered by oceans. According to this website, the only countries ending up in China are Argentina and Chile.