Vienna is the capital of Austria. It is one of the most beautiful cities in Europe. In Vienna you can admire the imperial architecture, and visit the places that influenced some of the most famous classical musicians: Mozart, Beethoven, Schubert, Strauss, Brahms, etc.
Yes some women have found that when they are pregnant their urine becomes darker and can smell stronger than usual. There a few potential causes of this. Pregnant women tend to have a greater sense of smell and taste so if they may be able to better smell their own urine, even though it actually hasn't changed.
It is the change in the color of the urine during pregnancy. A pregnant woman might see the color of her urine changing from pale yellow to bright yellow, brown and sometimes even red. The following Buzzle article discusses the causes behind the change in urine color in pregnant women. Dehydration.