If you are ever lost for something to do in the Middle East (in itself, nearly impossible!), this is one unmissable location. The Sheik Zayeed Grand Mosque is certainly very accessible and incredibly impressive. Good news is, like many of the more important mosques in the Middle East, this is fully accesible to Westerners. Women do have to be covered (a jelabi can be borrowed for the visit) but otherwise it is OK to photograph in all the mosque areas, inside and out. And you can use a tripod. Same for the Hassan II mosque in Casablanca, and the Umayaad Mosque in Damascus. Try doing that in Sydney Cathedral and see how long it takes to get thrown out.
Here are a few HDR shots from our first visit to the mosque.