Interesting story from James over at Japan Probe:

"Mainichi reports about a new website that uses Google Maps to track the locations of cool and unique manhole covers in Japan:

Contributors can add photos of manhole covers directly from their mobile phones, along with global positioning system (GPS) data to mark its location on the map. The website can be seen  here (Japanese)."

I would have never thought that I would (waste) spend 30-minutes looking at manhole covers!