This site lets you explore how the georeferenced articles of the Wikipedia are connected.
1. Look for an article to start with:
Ctrl + click on the map to query for nearby articles or search for an article in the top right text box:
Not only places can be georeferenced, you can try something like David Livingstone or Mike the Tiger.
2. Click on the linked articles to see their connections, or the link in the popup to open the Wikipedia article.
Drag the map to pan, mouse wheel or double click to zoom.
That's pretty much it.
I wrote this app to play around with some of the fantastic datasets that provides DBPedia, specially the "Geographic coordinates" one, that holds the geographic location of more than 380.000 Wikipedia articles. You can find the dataset prepared in various formats on my site:
I loaded the articles and their relations in a PostGIS database, and build a geoservice with the MapFish geospatial framework, based on Pylons. On the client side, the viewer is built with GeoExt and OpenLayers, with a base map from OpenStreetMap and imagery from Bing.
I would love to hear your comments and feedback!