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October 15, 2009
Tunneling under the city of Mecca
The city of Mecca is an interesting place. Because of its position in a narrow valley, they've had to work hard to continue to expand the transportation system over the years.
As a result, many tunnels have been built under the city to handle both pedestrians and vehicles. While you can can see many of the tunnel entrances in Google Earth, it can be difficult to determine where they all lead. A handful of users in the Google Earth Community (led by "Diane9247", with help from various others) have been mapping out the tunnels to try to determine where they all lead. The thread is an interesting read, and you can view the results of their work in this KMZ file 
(shown below).
During the annual pilgrimage to Mecca, where roughly three million pilgrims travel to the city, the capacity of the tunnels becomes very tight. Over the years there have been a number of tragic incidents, typically caused by a stampede of people. This file really showcases just how immense the network of tunnels has become.
[UPDATE: As some of you pointed out, between the time this mapping started and now, updates to the Google Earth road layer made much of this work obsolete. However, it's still a nice testament to their hard work, and they point out a few additional areas that road data doesn't cover. It'll be real neat once StreetView covers the area!]
Posted by mickmel at October 15, 2009 3:44 PM
Comments
Posted by: Mohammad Fathy at October 15, 2009 5:51 PM
Street View will never cover cities in countries under a dictatorship, unfortunately. Especially not Mecca, because most of street view visitors are infidels and not muslims, and infidels are already denied access into the city on religious grounds.
Posted by: nykos at October 16, 2009 8:10 AM
One has to be a Muslim to visit Mecca. I doubt streetview will be around anytime soon.
Posted by: Miles at October 16, 2009 5:08 PM
Maybe someone have something like this for Prague ?
Posted by: fjk at October 25, 2009 7:57 AM
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Thank U Google for consideration off the holly city Makkah