I love old maps. Many are wildly inaccurate. Many are fanciful. Many are surprisingly well done. In our era of Google Maps and GPS, it is easy to forget that early mapmakers could not easily see what they were drawing from above. The combination of skills, tricks, rules-of-thumb, and artistry that goes into cartography bends the mind.
David Rumsey has collected maps for decades and decided to donate his map collection to the Internet. Now, the internet has one more thing with which it can distract me.
*Hat tip to Rebecca Rosen.