Czech wine (1/2)

It seems that although there is good wine in Czech Republic, I was unable to taste it. Some people say that the area around Praga is not the best producer in Czech Republic. For this area, beer is much better, and certainly it is in this case. Another interesting question is: which is the reason to put the name "portugal" in their bottles? I saw several different bottles with this "mark".
The following two wines were specially bad (both, white and red).