Stadshuset is one of Swedens most famous buildings, designed in 1907 by architect Ragnar Östberg, who was very inspired by italian renaissance architecture at the time. Next to it is the newly finished Stockholm Water Front building.
If you want to try something outside the city center this is a really beautiful small gem. They cook delicious seasonal food and have a nice selection of cheese and charcuterie for your wine. Best to book table beforehand.