GeoURL is a location-to-URL reverse directory. You can find URLs by their proximity to a given location. It's currently listing 135,140 sites.  Their site has a world map (pictured below) that shows all the latest entries.  Clicking an area on the map will do a url search in the area of that location.  Pretty cool stuff.  You can add a couple meta tags to your site and get listed too.

Start snooping on your neighbors here.