Well, I give up....
I don't mind doing a bit of research to help someone but this is ridiculous. I cannot find the place on a map in relation to the location of the restaurant name or the hotel (apartments) name. Someone earlier in the thread suggested Bgmaps which is always very good but, for some reason, it will not show the street mentioned, either in Bulgarian or English. Google hasn't helped either. I can find many references to both through searching but invariably there is no map at the link or, if there is, it is a map of Varna, lol, with no marker. One site even mentions a website, which I had tried already, and it turns out to be one of these multiple links but no real information type sites.
I suggest that you perhaps phone them on the number listed.
Best of luck Pixiewixietrixie.
Oh, itisus has put a map in his gallery. Sorry, didn't see that
However, lousy map, you can't read it and can't blow it up.
Try 43º13’01”N, 27º57’07”E on Google Earth
you could look for ul. D-r Lyuben Popov and drop down just below ul. D-r Vasilaki Papadopolu to a little no-name road on a level with TV Center - Varna