Besides maps, one of my favorite topics to study on this website is coffee!
Here's a simple map I made by overlaying locations of coffee shops onto a map of the UW campus, and drawing some simple circles. What it shows is the walking distance to coffee shops around campus, and that the entire UW campus is covered within a 2-minute walking time! [original post]
Next we extend this idea, and look at coffee shops around the country. Below is a map of the distribution of Starbucks stores in the US. The wire mesh is a triangulation that enables us to find the lowest Starbucks density point, which is around 140 miles from the nearest Pumpkin Spice Latte! [original post]
Finally, here's a really neat series of interactive maps by the MIT Media Lab, showing coverage maps of independent coffee shops in several major cities throughout the US. Below I'm showing a screenshot of the map for Portland, OR. [original post]