Wikipedia Map is a showcase which visualizes all geo-tagged articles in the Wikipedia. Each geo-tagged article is marked at the corresponding coordinate. Out of it a world map of geo-tags emerges. The dynamic map is completely created in your browser. This has the advantage that the map is interactive, you can zoom into it, change colors, and see for every point what article it is and link to it. But it has the major disadvantage that it requires some heavy resources. This link may crash your browser. Use a reasonably fast machine, a current version of Chrome, and be patient while loading the data — your browser is loading more than 50 MB of data and processing it via JavaScript into an HTML5 Canvas. By the way, you can locally safe and open that page in order to have the map interface with you without having to load it every time.