The cache is not at the published coordinates! 
Attention please!
Because of extensive constructions in this area, there is a new location of a temporary cache.
Move 40 meters North-West from your determined coordinates to find the new location of the final.
See also the modified hint and the spoiler photo.
Happy hunting.
In December 2012 I spent some days in Vienna with my family as tourists.
I was not only overwhelmed by the huge amount of geocaches in this city (more than 1600),
but also by all antique and historical places, buildings and palaces.
On the picture below, you can see one of the tourist magnets in the center of the city,
the so called "Burgtor" (castle gate).
The Burgtor was ceremonially opened by the Emperor of Austria, Franz I. in 1824.
This monumental building also hides a traditional cache with the same name "Burgtor" with more than 21900 founds and remarkable 858 favorite points.
Link to Burgtor cache
This mystery cache is hidden at the Mina area in Abu Dhabi, and you can find the coordinates in the picture.
Check your answer of this puzzle at GeoChecker.com.
