Fun With Maps

Here's some interesting map-related links I've found recently:

• "If you dig straight down, where will you end up?" -- The age-old question, finally answered! (And no, it isn't China.) This is an interesting use for Google Maps. Pick a point in the world, and it will show you where the exact opposite side of the world is.
• Worldmapper is creating maps that change the size of territories based on statistical data. For example, the USA is huge on the defense spending map, and smaller on the population map.
• WIKISKY is an interactive sky map. Click on a celestial object and get pictures and lots of info.
• Social Explorer has hundreds of maps showing historical demographic data for the United States.
  

That's all I have for now. I'll post more as I find them.